This battery charger is a blessing for me as I run a Tascam DR-680 Sound Recorder, which is supplied with 8 AA batteries / rechargeable batteries (AA). Previously, it was a cramp, with the usual 4-batteries-loaders to fill these batteries again, now go all in one fell swoop into the device. Nice gimmick is that you can also load it and AAA batteries in pairs less than 8 batteries. However, for the time being I will not charge batteries simultaneously with different charge levels, or different makes / capacities. Whether this works and the charger does not switch off at the first full battery, I have not tried yet. The store itself - well, what can you say about it - when full, control lamp out. Works and the batteries are also pretty full.