your wall wart will charge either NiCd or NiMh, you want to stay in the 1000-maybe 1400 range,at 4.8 volts,,, thats high, I run 600 to 1000 at most, I do have 1 1400 battery from a previous owner but that was for balance....your not gonna fly all day on any pak, if you want to get 3 or 4 800mAh paks to have one on charge all the time...and get a 12 volt jumper battery from walmart for $30...they come in real handy....Rog