Airborne batteries

[Bob Richards]

Guys,
 
I'm needing to replace several nicad airborne packs for my radios (as well as a couple of transmitter packs). I'm wondering what has changed in the technology in the past 8 years. 
 
NiMh packs had just hit the market about 10 years ago, and as I recall it seemed that they did not stand up well to vibration - several inflight failures being reported. Seemed they were ok for transmitters. Has that changed?
 
I know Li-ion and Li-poly are now available, but what type of charging apparatus am I looking at investing in? I also think I need to use a regulator with these?
 
I don't presently have a fast field charger and would like to have one, is there one that covers all the above bases?
 
Thanks in advance,
 
Bob Richards.
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