Usable batteries: 18650 batteries, mobile phone batteries, tablet batteries, MP3 batteries and other 3.1V-4.2V polymer lithium batteries, (note: parallel connection increases capacity, series connection increases voltage, and can only be used in parallel!) Unusable batteries: dry batteries, accumulators, 1.2V rechargeable batteries, nickel-metal hydride batteries, 3.2V iron-lithium polymer lithium batteries, etc.
Small size supports charging and discharging Overcharge and over discharge protection
Input port: Micro USB
Input requirements: 5V constant voltage power supply can be used as charging input power
Output port: USB
Output parameters: 5V1A
Product size: 18*20mm
1. The batteries must be connected in parallel, and the voltage must be between 3.2-4.2V to work. Both 18650 flat-head and polymer batteries can work;
2. The battery is positively connected to the motherboard B+ negatively connected to B-, if it is installed reversely, the resistance will be burned out;
3. It is not recommended to mix old and new batteries, batteries with high internal resistance, and batteries with large capacity gaps.