New rechargables are usually sold without much charge, so the first thing you do is charge them.
I remember reading somewhere that LiPO do best stored partially charged. Batteries can do bad things when abused - I just saw on the news that Samsung has halted their Note 7 after several of the replacements for the ones with battery fires also had battery problems on an airplane which really gets people excited !!
The chargers I have (Maha etc.) all take both NiCd and NiMH batteries, but they do recognize the difference in them