Being that many are using lipo's because of there higher ma rating and low self discharge, I had to comment.
It's my concern about the posable fire from over charging as well as killing the pack if left on over night. Not to mention the strain the added voltage puts on the regulator circuit.
Many add a diode or change out the linear regulator for a switcher type to prevent overheating.
My answer is to spend the extra money and buy a 9.6v Sanyo Eneloop battery pack. It acts like the way all packs have in the past. It can be fast charged. It never goes to high to strain the stock regulator, it won't get killed if left on and goes dead. It's Ma capacity is 2000Ma and it can hold 90% of that for a year according to Sanyo.
Will not flame up if overcharged.
The instalation only required was to unplug the old nicad/nimha pack and plug in the new one.
KISS and safe is what I was going for. So far I've found nothing negative and get long tx times.
Just my opinion,
thank you