which battery Brian?
My used 722 came with a bad 6000 mAH / 7.4v Power2000 battery. I used two 7600 mAH / 7.2v Impact batteries successfully for a while, but they're both dead or mostly dead, now. After a full charge, one registers 6.8v, the other 7.3v, while Stagger's 7.2v battery registered 8.0v. I think in the case of the Impacts, it's user error - left 'em both charging on the 722 for a loooooong time as I forgot about 'em. Not sure why float-charging would kill the batts, but...wouldn't surprise me. Gonna look into new batts + an external charger.