Dodgy over discharge voltages The auto activation version I needed a battery protection board for my battery powered tube amplifier, I decided to buy several battery protection boards from Ebay, the reviews looked good and most of the boards seemed very popular. Once I received and tested the boards I noticed a few problems: All of them were using the ABLIC S-8254A IC, but the product code did not match the manufactureres datasheet, this led me to believe these ICs were fakes.
Just some random circuits that I've built.