I've used one of BBbastard's NPT charger on all my batteries for the past season (since Feb2007). No worries about burning down the house overnight, charges/tops-off really quickly, simple red=charging/green=done (I've got other things to do than to sit around watching batteries charge), comes with all the connectors for just about every type of connector (except Deans Ultra...hint hint). There's only one switch on the thing, to charge between 1A and 2A.
I have no idea if it prolongs the life of the battery, removes memory, revives a dead battery, makes your gun shoot for ever all day, whatever/etc....I'll just leave that to the battery/electricians out there to debate. It just works (as long as you plug it into the wall for power!!!
).
The ONLY time it didn't pickup and autodetect a battery, was when I was helping out a new guy and his battery was so dead that neither his smart charger, nor mine would detect it. I plugged it into a $7 wall charger for 15min and then the NPT charger would pick it up. It took a long time before that one was done, but the new guy has been rocking on his M4 ever since.
PLUS...it's f*cking silent...no fans, or droning noise, no beeping or buzzing...
PLUS...the times that I've dealt with Scarecrow, he's been extremely good and fast at replying to questions or followup info. Shipping times were great. His prices are extremely competitive for what you're getting and he'll stand behind what he sells.
And yes...I've run out of 0.20 bbs and am hoping he'll toss me some gratis for this unsolicited, shameless plug...just kidding, LOL.
Tys