USB-CHARGER-PCB

New product

Mini USB Lithium Battery Charging Board

£ 1.80tax incl.

This USB charger pcb is an extremely small module measuring in at only 19mm x 25mm. It uses the TP4056 controller and is setup as default to charge at a 1A charge current. See the full description for more details

This USB charger pcb is an extremely small module measuring in at only 19mm x 25mm. It uses the TP4056 controller and is setup as default to charge at a 1A charge current.
 
The board runs on any 5 volt power supply, this can be through the usb connector or there are solder pads if you want to use your own connector / adapter. You need to make sure that the 5v supply whether usb or from an adapter is rated at least at a 1000ma output.
 
If using with smaller batteries, 14500, 18350 etc you will need to change the charge current from 1000ma to something more suitable. Most entry level lithium battery chargers such as Trustfire and Ultrafire charge at 500ma so consider that a suitable level if you're not sure what to change it to.
 
The algorithm for the correct rate to charge a lithium battery is to charge at 0.2 C to 0.7 C, C being the capacity of your battery.
 
So if you have a 800mAh XXXfire battery:
 
0.2 to 0.7, lets call it 0.5C
 
So 800 / 0.5 = 400ma charge current.
 
Please refer to your battery manufacturers technical specifications if in any doubt where you will find the suggested charge rate.
 
The resistor is a 0603 size smd resistor and are quite small so take care with your soldering if replacing. The resistor you need to swap to change the charge current is outlined in red in the second product image.
 
Resistor SMD 0603Charging Current
30k50mA
20k70mA
10k130mA
5k250mA
4k300mA
3k400mA
2k580mA
1.66k690mA
1.5k780mA
1.33k900mA
1.2k1000mA

Supplied with mini usb cable

Please note if you get the battery polarity wrong it will release the magic blue smoke that makes the charger work.

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Mini USB Lithium Battery Charging Board

Mini USB Lithium Battery Charging Board

This USB charger pcb is an extremely small module measuring in at only 19mm x 25mm. It uses the TP4056 controller and is setup as default to charge at a 1A charge current. See the full description for more details

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