Hi winaa,
Assuming you're after a charger for NiMH batteries, I use and highly rate the Maha MH-C9000 Pro charger. It's probably the best NiMH only charger out there and can charge 1-4 cells, every cell can be charging/discharging on a different cycle, including re-conditioning cycles like analyse and refresh. If you want a do it all charger, Nitecore has some cheaper options like the UM4. They can't re-condition batteries though. The SKYRC MC3000 is probably the most advanced battery charger on the market currently, can charge pretty much any battery you can think of.
Regards, Joel
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