Because I'm also into "battery RC", I have a selection of battery chargers.
I use a few different Venom chargers that can do NiCad, NiMH, LA, LiFe, etc. most can be powered by a wall outlet at home, or 12VDC in the field.

Look on RC hobby sites (Tower Hobby, local place, etc.) and look up specs for Venom ProChargers. See what you think.

Note, most can also do automated charge/discharge cycles to measure battery capacity, nice thing to do late winter before flying.

PS, yes, if you look close, several brands all look the same, different "mfr" or model name, I believe Venom is the actual mfr.