I have two Volt automatic batteries, a 65mm and 78mm. I have noticed lately that the 78mm has a short life span per charge, relative to the 65mm. I have also noticed that the draw on the 78mm has been difficult. I thought maybe my cartos were starting to go. I just tried the same carto on the two batteries back-to-back on full charges and the difference is night and day. The draw is nice and easy with the 65, really difficult with the 78. Is my 78 dead? I have scraped out the top of the battery with a q-tip, this didn't really help.
