Review on Mudder Pieces Charging Battery Protection by Richard Turner

This is a fantastic price for 20 pieces of this charging board. They charge one ampere at most and I checked this with an ammeter. All 20 work without problems. They are very simple, 2 wires in your circuit and I have no problem charging 3 batteries at the same time, 3.7 volt li-ion 18650 and lithium batteries. They will also charge your cells while sitting because of course they drain energy slowly, but that prevents that. This is definitely the best deal on Revain and even better than what you can find on auction sites. I definitely recommend her highly. And don't worry about the standard USB input, because most of the time I and others solder the 5V connection directly to the board.