Review on ⚡ Efficient E-flite 1S USB Li-Po Charger: Rapid 300mA Charging by Andy Baker

Great charger for any 1S battery! The problem we see here is that it is only compatible with one type of battery; those with microconnections. If you have a hammer you can pry open the case and see the charging board and connector. On the other side you will see two unsecured connections waiting to be used. I added a JST connector and now I can charge 350mah batteries with my quadcopter! Instead of charging it at peak current, it takes a while, but it does its job well. The charger itself is still a great charger without modifications. The socket, on the other hand, sometimes pushes back too much when inserting small 150mAh 25c batteries. I thought it was defective when it didn't charge. but no. it was good then i decided to open it. It's held in place with glue and pins, so if you get it right you can always glue it back together. I left mine unsecured so I can use the changed connection for my other 1S batteries. I'm just very glad that it doesn't recharge my batteries, unlike the Syma X1 and the yellow heli cable.