Thanks Fluid, I don't run the pac down to nothing, never have. A lot of times the boat will not even get used (my boats don't break down! LOL) altho the battery pac has been charged at home before I go to the lake. I've got a new pac comming, I wouldn't exactly call them cheap @ $25.00 + shipping! http://www3.towerhobbies.com/cgi-bin...?&I=LH2168&P=1 Guess I'm not battery smart. I think I'll see how low I can set the amps on the Pirahna charger for the initial charge. Then I'll crank the amps up a bit for future charges. Thanks, Brian