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Can you charge 18650 batteries with USB

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Charge 18650 through USB port? I recently bought a Snow Wolf mini with two 18650 batteries, and I was wondering if it is possible (and/or safe) to charge them through my USB port in my mod? I don't currently have a charger and I don't have enough money to purchase one right now, so I was wondering if I could just charge them through my USB I'm looking for a charger (power bank) that can charge a phone using 18650 batteries. I got this one that takes 2×18650 from Ebay: The first one didn't work and I couldn't measure any voltage on the usb-out I'm wondering how I could/should charge the 18650 batteries used in the following circuit. I want to charge them via USB in a power bank case like this. But I probably won't be able to use the existing charging circuit because I'm using the batteries in series to get more voltage. simulate this circuit - Schematic created using CircuitLa And then I'm just gonna chime back in after this with VERY short question of which batteries I should get for how I vape with the 2 or 3 new MODS I'll be getting after learning your inputs on if I can safely USB charge a single 18650/26650 Non-DNA MOD [HELP] USB Charger for 26650 & 18650 batteries Does anyone know of any good chargers that can be powered via microUSB or USB-C that would charge both 26650 and 18650 batteries? Ideally I'd like something that could charge at least two batteries at a time

Secondly, it was proved that li-ion batteries aren't suitable for fully charge. Instead, you can charge it any time, anywhere you want. You are even prefered to charge partially in short periods of time, like 10-30 mins. The reason is because li-ion batteries tend to increase the constant voltage as the capacity goes up to 100% This video was made for demonstration purposes only and this method is not intended to replace a CC/CV power source. However I hope it gets you thinking outs..

Charge 18650 through USB port? : electronic_cigarett

Insert one or two batteries, and connect USB device, the charger will automatically charge the external USB device. The max output of two batteries is 2A, the max output of one battery is 1A. When the power (or voltage) of battery is different, the charger will discharge the higher one, then discharge two batteries together TP4056 Micro USB Battery Lithium 18650 Charging Board 5V 1A Easily charge your 18650 batteries with this module. It offers to overcharge protection with current cut off and indicators. It is small and portable It generally takes about 4 hours to charge an 18650 mod battery using a separate charger. If you use a Micro USB charger, it is likely to take about three hours. However, be advised that there can be some slight variance in charging times, even for a new battery 4 Bay USB Speedy Charging Smart Battery Charger Fit for Solar Panel,Universal Intelligent Charger USB Output Port for 3.8V 3.7V 18650 26650 14500 16340 RCR123A LiFeO4 1.2V Ni-MH Ni-Cd Aa Aaa Battery 443 $16 8

Charging USB devices with 18650 batteries

  1. While there are several factors that can impact the charging time of your battery, the 18650 battery charging time averages four to five hours each evening. It is best to plug your batteries in and let them charge all the way up before you unplug them. Similarly, you should use your batteries until your device tells you that they are dead
  2. It has a built-in micro-USB port, enabling you to charge the battery from a wall outlet, power strip, or computer using a separately available USB cable, negating the need for an external charger. However, if you'd prefer, you can still insert the battery into a charger just as you normally would
  3. The RUG 18650 Lithium-Ion Batteries can be charged via the onboard Micro USB port or by a traditional charger as well. (Charger and/or USB cable not included) With a capacity of 2600mAH, these batteries will last you a long time. They will run 800-1000 charge cycles if properly maintained
  4. Innovative Micro-USB Charging Port. The Klarus-18650UR26 is an incredibly durable and fast charging 18650 battery. This battery is perfect for LED Flashlights and many other household appliances. Capable of charging up to 500 times - this cell is financially and environmentally friendly. You will only need to buy one and it can be used repeatedly

Dickssportinggoods.com sells 18650 batteries. In fact, they even offer the ARB-L18-3500U, which is a protected 18650 battery that has a USB port built right into it. You can literally plug a micro USB cable into your battery to charge it. The one Dick's Sporting Goods sells, has a battery level indicator light Nitecore HC90 900 Lumen CREE XM-L2 T6 LED USB rechargeable headlamp 2 X Genuine Nitecore NL189 18650 3400mAh Li-ion rechargeable batteries, Nitecore i4 intelligent Charger, in-Car Charging Cable and Two EdisonBright CR123A Lithium Batteries. 4.7 out of 5 stars. 48

battery charging - Smartest way to charge 18650 batteries

  1. Please note, this item ships from an international seller. Expected delivery is 10-15 days. Description: This USB 4 slot battery charger can individually charge 1-4 batteries at the same time,in this way is time saving. This USB 18650 battery charger has LED indicator light for each slot which will turn green when the batteries is fully charged
  2. ates AAA batteries a little early, but that is actually safer than overcharging, so it's not really an issue
  3. It can revive low-voltage batteries, and it has short circuit, over-charging and reverse polarity protection. Unlike most options, this is actually an 18650 USB charger, which is powered by any standard USB port or wall adapter. 1 - Nitecore Q2 You can pick up the charger (along with wall adapter) for $18.91
  4. Mount the 4x 18650 Battery Holder with the + marking facing the top of the board. Mark the hole positions with a 0.7mm Drill bit or a Scribe via the center pin on each of the TO-92 DS18B20 Temperature Sensors. Remove the 4x 18650 Battery Holder and drill a 6.5mm - 7mm hole. I recommend using a smaller drill bit first
  5. With this charger, you can easily charge two 18650 batteries at the same time. It also fits many other batteries. The charging speed of this charger is also very fast. Hence, you will not have to wait too long to fully charge the battery. It also comes with a smart LCD display and USB input. It is also very safe to use. Pros. Safe to us
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Multi-function: This Batteries Charger can charge almost all Li-ion, 9V, Ni-mh, Nicd batteries. It can recognize the battery type and automatically charge the battery at the selected charging current. With LED display you can clearly read the charging process Free 2-day shipping. Buy Rinhoo Battery Charger Rechargeable 18650 Lithium Battery Charger 3 Slot USB Cell Charging Station Stand at Walmart.co Here is a summary on how to charge a battery: Insert the battery to match the polarity marks (+ and -). Plug the LITTLE end (Micro-USB) of the cable into your charger. The bigger end (regular USB or USB-A) of the cable plugs into your computer or other USB port that will give you power. Micro-USB Charging Port: The LED indicator displays red. Jun 23, 2016. Thanks for the replies. Maybe I'll sacrifice a bit and end up getting something slightly bigger or less personal preference of aesthetics for the single 18650/26650 mod and get a DNA even though it should be safe to usb charge a non-DNA chip, just to be extra careful, but either way ok. stols001 said: ↑

So I plugged that in to the other USB to charge. I understand that was a mistake now. Both mods stopped charging and it seems as though the USB ports stopped working. Now my question is, can I use the A/C D/C adapter that came with my iStick to charge the Sigelei and the corresponding 18650 inside Can I Charge 2 18650 with 2 TP4056 boards with single input. Note how this boils down to two batteries each charged by their own TP4056 module and the charger modules sharing the same 5 V USB supply. each other. That is just a charger for two separate batteries. The 5V supply also needs to provide enough current for charging two batteries - 18650 Li-ion batteries. The amount of batteries required is up to you, personally a single battery gives me more than enough work time and reduces the recharge time. I recommend only using trusted brands of batteries like Samsung, Sony, Panasonic etc. Amazon - 18650 - Li-ion charging + protection board. Amazon - TP4056 - 3.3ohm 1W Resisto If you have 18650 Li-Ion batteries, connect one battery as shown in the following connection diagram. You can charge only one battery at a time. In order to charge the battery, you can either use the IN+ and IN- terminals and provide 5V or alternatively, you can use an USB cable to directly charge from USB supply

SINGLE 18650 MOD safe to USB charge? & What battery for

  1. 21700 battery is short-hand for a rechargeable, lithium ion battery that is 21 mm in diameter and 70 mm long. The big advantage of a 21700 battery over an 18650 battery is the overall energy capacity possible. 21700 batteries are able to reach a maximum capacity of 5000mAh. How to charge 21700 batteries and compatible chargers
  2. This charger is powered using a universal micro USB interface and can be connected to any compatible computer or USB wall outlet. Charge all of the most popular sizes of Li-ion batteries including 14500, 16340 and 18650 rechargeable cells
  3. The RUG 18650 Lithium-Ion Batteries can be charged via the onboard Micro USB port or by a traditional charger as well. (Charger and/or USB cable not included) With a capacity of 2600mAH, these batteries will last you a long time. They will run 800-1000 charge cycles if properly maintained

Fenix ARB-L18-3500U mAh USB Rechargeable 18650 Battery. Micro USB charging port lets you charge the battery directly. Button-Top Design. Protection circuit built in the anode with a riveted steel hat. Riveted steel shell eliminates the risk of short circuit caused by collision and impact. Pressure Relief Vent: Expels waste gas generated by. For example, the capacity of 18650 battery is generally 1800~2600mAh. According to the above formula, the choice of charger and the charging time of 18650 battery (discharge within 0.2C) are as follows: 1800mAh generally uses a 350mA charger, charging about 7.5 hours (1800 ÷ 350 × 1.5) Prev: what is a 18650 battery? The USB charger is meant for charging single cells from a USB port that can provide 500mA or so. The USB/DC charger is meant for charging batteries from a USB port or a DC power supply up to 12V. The latter is more flexible, but more expensive because of the added circuitry. You'll note that both have battery ports on the bottom (Labeled. It came to my knowledge that charging the batteries directly from the charger would severely damaged the batteries.. So I dropped the voltage using two diodes connected in series, it gave me 4.0V, I don't need an ammeter to know that the diodes also took down the current, because it took an hour and half to charge a 18650 from 2.8V to 3.2V.

My advice if you really want to charge multiple 18650 at the same time, you can either take apart an old powerbank (eg:xiaomi powerbank) and use it's circuitry to charge all of your batteries at once or you can buy a power bank diy kit case from aliexpress or banggood or ebay that allows you to charge multiple 18650 cells simultaneously as they. The HB-X2 is a compact three-in-one charger, storage, and powerbank solution for 18650 batteries used in the Huni Badger. Connect the HB-X2 to a USB power source (2A minimum recommended for faster charging time) with the included USB-A to USB-C cable, and insert up to 2 batteries in the dual slots to charge. It supports pass-through charging.

Power a myriad of high-drain electronics, including flashlights, lanterns, headlamps, and various other devices with the NITECORE 18650 Rechargeable Li-Ion Battery.It has a built-in micro-USB port, enabling you to charge the battery from a wall outlet, power strip, or computer using a separately available USB cable, negating the need for an external charger Streamlight's 18650 Battery Charger Kit allows you to charge two 18650 lithium ion batteries simultaneously for use in the Pro Tac HL® USB, the Pro Tac HL® 4, or other Streamlight flashlights that use 18650 batteries. This kit comes with an 18650 button top, 3.7V, 2600mAh lithium ion battery, which features an on-board safety control. It generally takes about 4 hours to charge an 18650 mod battery using a separate charger. The 18650 cells can not be used in place of standard AA batteries, rechargeable or otherwise: The nominal voltage of the 18650 is significantly different from the 1.5x3=4.5V of the three AA cells, assuming those are connected in series

XTAR MC2 2-bay USB Portable Li-ion Battery Charger with Cable - Charges 18650, 18500, 14500, 16340, 26650 - Xtar MC2 2-Bay lithium-ion battery charger The Xtar MC2 is a fast and reliable battery charger for lithium-ion batteries. This charger is powered using a universal micro USB interface and can be connected to any compatible computer or USB wall outlet Streamlight 18650 2-Pack Protected Lithium Ion Battery With Built-In USB Charger Rechargeable Innovation. Streamlight now offers a button top, protected 18650 Rechargeable Li-ion Battery with built in micro-USB charge port. This battery not only saves you money by being rechargeable and reusing drained cells, but it also does the environment a favor by being a quality alternative to disposable. MakerFocus 10pcs TP4056 Charging Module with Battery Protection 18650 BMS 5V Micro USB 1A 186 50 Lithium Battery Charging Board. Inputs with MICRO USB female, can be directly input to do with the phone charger rechargeable lithium battery. And still retains the input voltage wiring pads, can be very convenient DIY

Easy to use and secure Can also be use as Battery charger for 18650 batteries Function: power bank and rechargeable 18650 battery charger Plug and Play, power output using the USB port, plug the data cable to achieve portable, ready to charge Compatible with: iPhone6 plus/6/5S,Samsung Galaxy S2/S3/S4, Note 2/3/4, HTC, Sony, Motorola and other. This makes it the best 18650 battery charger if you're looking for value. Versatile Charging. The range of batteries you can charge with the Nitecore D4 is impressive. All 4 bays are convertible and can fit 10 different styles of Lithium-ion battery, as well as Ni-Cd and Ni-MH batteries Power up your next adventure with the NITECORE F4, a four-slot battery charger that can serve double duty as a power bank and battery organizer. The F4 is equipped with 2 USB outputs for charging and a micro-USB input for charging 18650 IMR/Lithium Ion batteries. The USB port allows users to quickly charge and power devices with a maximum. The built-in charging port makes it easy to recharge this 18650 without the need for an external charger - all you need is a USB charging cable (which is included) and you're ready to go! This battery can easily power up your favorite SureFire products with its 3.6 volts of power and 3500mAh capacity The Dual 18650 Battery USB Charger is the perfect 18650 Battery charger for you whether you are home or traveling. It is designed to charge your batteries quickly and safely. It automatically stops when charging is complete. The charger has a LED indicator that will turn red to show that the battery is charging, and turn green when charging is.

Fitorch P20RGT XP-L High USB Rechargeable Charging

Step 12: CHARGING 18650 BATTERY USING SOLAR. 3 More Images. Connect 18650 battery holder on PCB. Connect the jumper pin to the 2 pin connector on the PCB, Now you can see the fourth led burning. Now set the battery to the holder,You can see that the led turns off when the battery is set to the holder, and when the battery is fully charged, the. LIGHTWEIGHT AND COMPACT - Weighing 1.43 ounces and less than 5 inches in length, the lightweight and compact size of the UI1 allows you to carry it with you on the go. UI1 CHARGER KIT - Included in this bundle is the NITECORE UI1 21700/18650 battery charger, usb cable, and LumenTac battery/cable case. Customer Review 20g. Lumintop 26650 Rechargeable Li-ion Battery with. High performance3.7V/5000mAh flat-top and protected cell. Protected with anti-reverse, overcharge, over-discharge protection. Over 500 charge and discharge cycles, economical and environmental protection. Fit for various high-drain devices such as LED flashlights

High performance needs high amps, but LiPo can be

[HELP] USB Charger for 26650 & 18650 batteries : flashligh

The Efest MEGA USB 2-channel charger is a USB powered charger for a variety of 3.6V/3.7V 18650, 20700, 21700 and 26650 batteries. check_circle 18650. check_circle 21700. What's cool: 2 channel Charger with automatic change mode between 0.5 and 1A; LED Indicator with built-in 4 power level indicators to indicate charging percentage timel When you charge and discharge 18650 battery, it is counted as one whole cycle. It is recommended that you should charge lithium-ion batteries up to 4.2V and discharge them up to 2-3V. On the safe side, never discharge the 18650 battery lower than 3.0V T6 LED Flashlight +4pc 18650 Li-ion Battery Rechargeable Batteries +Dual Charger. Brand New. $12.95. Save up to 20% when you buy more. Buy It Now. Free shipping. T As a result, at a time you can charge two different batteries of different capacities and types without fearing any damage to the batteries or the charger. Just like the rest of the best 18650 battery chargers, this product too has a LED display wherein you can keep track of the status of the battery and the mode in use to charge the battery

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How To Charge 18650 Li-Ion Battery Correctl

You can charge two batteries at the same time at 1A or charge just one battery at 2A. The neat thing about this charger is that it has a USB output that you can take with you on the go and use to charge USB powered devices directly from the batteries inserted into the charger. LED Display. Red: 1-30% Charge; Yellow: 30-60% Charge; Blue 60-90%. The Fenix ARB-L18-2600U 18650 Battery is officially released today! This new battery is micro USB as well as ready to charge within a charger. NOTICE: USB CABLE SOLD SEPARATELY - CLICK HERE TO ORDER ONE. Notice: The price is $13.95 for one battery. Packed one battery per package

How to Charge Lithium Ion 18650 Battery with Just a Smart

It's recommended to take the cells out, and use a dedicated 18650 battery charger to charge them. DIY Case. Using a 2-cell 18650 battery holder, and some connectors of your choice, you can easily make your own an case. It's cheaper, more flexible and functional. The 2S balance lead allows you to balance charge the battery It's worth looking at flashlights that can use more than one battery type. In some scenarios, your 18650 battery may run out and you won't be able to charge it or find a replacement. Many of the best 18650 flashlights can also use CR123A batteries, and some can also use AA or AAA batteries The XTAR PB2S Red Battery Charger is great for charging lithium ion rechargeable batteries. The PB2S has added QC3.0 + PD3.0 Fast charging capability, expanded 21700 (unprotected) support, and a USB A + USB C output ports. A new display shows input/output voltage and curren The two bay 18650 Button Top battery charger can recharge one 18650 battery in as little as 3.5 hours, or two batteries in as little as 6.5 hours. The charger features dual input power sources, accepting either 5V USB power or 12VDC power. Dual input power sources provide a wide variety of battery charging options when a wall outlet is not. If you're using an iPhone and don't have USB-C lightning cables, you could use either of the 2 USB-A ports, which charge at 25W. If you have an iPhone 11 or iPhone 12, and use USB-C, you could recharge up to 11 times using the large 40,200mAh battery we tested. As an Apple user, you're probably less concerned about charging all the things than charging all your Apple things

How do you charge a 18650 battery with a solar panel

The Nitecore i8 is an amazing charger! Charging up to 8 batteries, the i8 also comes with dual-USB output ports for charging of other small electronics. The i8 can handle 18650, 20700, 21700, and 26650 sizes. A rare vertical charger, the i8 can charge two batteries at 1.5A, four at 1A, and 0.5A with eight batts Intelligent Charger: Has four independent charging channels, it can charge four lithium batteries at the same time. Users can choose different charging current to meet the needs of slow charge or fast charge. And the charger will display the status of each rechargeable battery when charging Buy overload protectors 1a 18650 lithium battery protection board micro usb / type-c charging module tp4056 with protection one plate on DHgate.com which is for sales at a discount now. Quality is guaranteed by pmyz. thermal protector, overload protection and thermal overload are of first-class

Amazon.com: 18650 usb batter

There are many sources of 4056-based lithium charger module boards on eBay for $0.50 to $0.80 each. If you have six 18650 batteries, then use one on these module boards on each and every cell. Get a 5-6 amp regulated +5V power source: a second-hand PC power-supply works well and sells for about $5 High quality ANSMANN Lithium battery 18650 with safety board and integrated Micro-USB charging socket. The charging current is limited internally to max. 1A. Easy charging of the battery with a standard Micro-USB charging cable. A PC, a power bank or a USB power supply (5V) can be used as power supply In the past, if you wanted to charge your 18650 battery, you need to purchase a separate charging device or use a built-in charging port if your flashlight had one. Thanks to the introduction of USB rechargeable 18650 batteries, you no longer need anything more than a micro-USB cable and a USB power source

Amazon.com: usb battery charger 1865

The RUG 18650 Lithium-Ion Batteries can be charged via the onboard Micro USB port or by a traditional charger as well. (Charger and/or USB cable not included) With a capacity of 2600mAH, these batteries will last you a long time. They will run 800-1000 charge cycles if properly maintained. Includes 3 different types of over-heat protection We can use any 5V charger with this module, just make sure the output current of the charger is 1A or more. The below image shows the module charging our lithium battery, notice the green LED is on. The output USB port is designed for 5V and 1A. The battery voltage from the 18650 cells is boosted to 5V to power out electronic projects Additionally, an external 18650 compatible CC-CV cradle charger (not included) can be used to charge the battery; possibly at a faster rate if so equipped. Features: High performance 3.6V 18650 lithium ion rechargeable battery with MICRO-USB port for ease of charging â no charging cradle neede This high-performance battery charger features USB charging allowing you to reload your batteries anytime, anywhere. The charger features two led indicators to show the charging situation. The charger also stops automatically once your batteries are fully charged. Features. Charges 2 cells at once; Charging / Fully charged indicatio acebeam 3100mah usb-c rechargeable 18650 battery Be the first to review this product ACEBEAM ARC18650H-310A battery has a built-in USB-C port and can be charged directly with a USB-C cable or using a traditional charger like a ACEBEAM A4

How to Prolong the Life of an 18650 Battery : 7 Steps

3.7V 4.2V Li-ion 18650 Battery LG Samsung Sony Panasonic 30Q 35E 25R VTC6 HG2 18650B 3000mah 30A 50A 20A 3500mah 2500mah Batteries for Power Bank Vape Pen Smok e-cigarette E-Cig E-C 18650 Battery 3.7V Li-ion Batteries USB Charger 26650 16340 1450 Looking to charge Sparkfun's 18650 lithium ion cell batteries such as part # 1568-1488-ND or 1568-1490-ND? 6/11/2018 Update: Pointed out in the reply below from DK Tech Kyle, we now offer a charger. You can see it as Digi-Key part number 1568-1748-ND. Thanks for pointing this out, Kyle! Here is a put-together solution to help recharge these batteries. You will need: Sparkfun's Li-Poly. 18650 USB Charger and Batteries Buy 18650 USB Chargers and Batteries Online Australia. Looking for an 18650 lithium battery charger? Lanplus brings to you an array of high quality 18650 USB chargers to suit your needs. Whether you are looking for a 2-slot charger, 4-slot charger or one that can charge 6 batteries at a time, we have them all The unique 18650 lithium ion battery can recharge with a micro USB cable or a standard li-ion battery charger. Easily recharge your battery with any PC or portable battery source. Note: micro USB to USB cable IS NOT included ARB-L18-3500U is a high capacity 18650 Li-ion USB rechargeable battery with a built-in micro-USB charging port. It also includes a protection circuit in the anode to help prevent short circuits, over charge/discharge and over heating. These USB rechargeable batteries can quickly be charged without the need for a separate charger

Everything You Need to Know About the 18650 Batter

Only US$6.99, buy best astrolux® sc01 type-c 2a quick charge usb battery charger li-ion/imr/inr/icr charger for 18650 20700 21700 26650 cell sale online store at wholesale price Can only use the 18650 battery of which positive pole is flat top. Specifications: Item Type: 18650 Li-ion Battery Charger Power Bank Box Material: Plastic Box Color: White/Black/Pink/Blue (Optional) Size: 10.8×6×2.3cm Battery: 3 pcs 18650 lithium battery (Not included) Port: 1x USB + 1xMicro USB Micro Input: 5V 1A USB Output: 5V 900-1000mA. Rated 4.20 out of 5 based on 5 customer ratings. ( 5 customer reviews) $ 13.49 $ 9.99. Micro USB lithium ion/lipo/ 18650 battery charging board, built-in TP4056 chip, set charging and battery over-charge over-discharge over-current protection all in one practical for your DIY 18650 battery power supply to prolong its lifetime

Amazon.com: Speedy 18650 Battery Charger XTAR PB2C USB ..

Blue Green Black Yellow DIY Power Bank 18650 Battery Case USB Power Bank Case Kit 18650 Battery Charger DIY Bo To recharge an ASP 18650 battery, insert the Charge Bank into a 12V vehicle outlet. The Charge Bank can also charge via its micro USB port from any wall or computer outlet. Once recharged, the battery can be inserted in any 18650 ASP flashlight. With a battery installed, the Charge Bank may also be used to recharge other electrical devices In this DIY project, I will show you how to design and build a simple but effective Solar Battery Charger for 18650 batteries. Using this project, you can charge two 18650 Li-Ion batteries directly from solar without any wall adapter. Introduction The need for sustainable living has led to the increased usage of renewable energy. [ High temperature can easily cause the model lithium battery to bulge or explode. Here are some storage suggestions: 1. Do not put the 18650 lithium battery into the water, or use the battery in a humid environment; do not store the battery when the ambient temperature is higher than 65 °C. 2, the best charging environment for lithium batteries.

At the same time, this feature also makes it so the LiFePO4wered/18650 can dynamically adjust to the actual output capacity of a USB charger. Although reaching a maximum charge current of 1.33 A when connected to a powerful 2A USB charger, it will not overload a less capable power source such as a computer USB port I like the new Milwaukee USB 3.0 AH Lithium battery, you can use it on a the whole USB line of LED work lights. The battery can be used with the 600 Lumen and 475 Lumen hard hat lights, 700 Lumen Flashlight, 550 Lumen Rover pivoting flood light, 445 Lumen Rover pocket flood and the pivoting head flashlight TP4056 Micro USB 1A 18650 Lithium Battery Charger Module. ₹ 53.10 Price Including GST. The TP4056 1A Li-Ion Lithium Battery Charging Module - Micro B USB is a 3.7V lithium battery charger module has on-board Micro USB interface. With Micro-USB onboard connector, you can directly connect to computer USB port for battery charging Amazon.in: Buy Faironly 3.7V 18650 Charger Li-ion Battery USB Independent Charging Portable 18350 16340 14500 Battery Charger Four Slots online at low price in India on Amazon.in. Check out Faironly 3.7V 18650 Charger Li-ion Battery USB Independent Charging Portable 18350 16340 14500 Battery Charger Four Slots reviews, ratings, features, specifications and browse more Faironly products online.