Description: If you need to charge LiPo batteries, this simple charger will do just that, and do it fast! The SparkFun USB LiPo Charger is a basic charging circuit that allows you to charge 3.7V LiPo cells at a rate of 500mA or 100mA. It is designed to charge single-cell Li-Ion or Li-Polymer batteries.
The board incorporates a charging circuit, status LED, selectable solder jumper for 500mA or 100mA charging current, external LED footprint, USB input, two pre-installed JST connectors for SYS OUT and BATT IN, and (back by popular demand) a barrel jack connector.
There is also a ‘SYS OUT’ with a pre-installed JST connector which allows you to connect the charging circuit directly to your project so you don’t need to disconnect the charger each time you want to use it.
Based on 2 ratings:
I tested it with the wall plug first and it worked as advertised so I installed it in my build. Once installed I wanted to charge it via USB and when I tried to plug it in all solder points came lose and the entire USB socket came off so I had no other choice but to use the wall plug. Too bad. I wanted to have both options but because of bad manufacturing I was left with one.
Those USB ports tend to be more resilient. I’m contacting you privately to discuss your issues. Thanks