I've long used re-chargeable batteries and this is my fifth charger and is, with ease, the best one I've owned. The greatest feature of this device is that it notifies you when you have a faulty battery with a red flashing light.
I was being driven insane with previous chargers apparently charging my batteries but then have the units I was powering fail after a very short period of time. So I'd buy more re-chargeable batteries, but still the duff ones would remain in the loop.
With this charger, I've identified the faulty batteries and recycled. For this feature alone I'd recommend this charger ahead of all others.
Also note though it's a large unit, capable of charging 8 batteries at a time , AA, AAA, C or D, or one 9v PP3, with a separate power supply.
Wish I'd bought one sooner.