I bought one (108T)....sent it back....the voltage drop was a bit too much for me personally....if I remember correctly, the v drop was close to a volt (.8V) under no load....they do not recommend using a 4 cell pack for this reason....I use 5 cell Nimh packs, but just didnt like the v drop....

Even if I used a batery backer that breaks the ground, I still can't charge unrestricted....I have smoke and lights that connect to the receiver also....I boughtt the Hughes charger and now charge all at once with no issues....charges everything...nicd, nimh, loin, lipo, a123.....