Ya both my Energizers and Duracells self-discharge pretty fast. When new they both held it just fine, now after a few hours they have a significant loss. I simply keep them plugged in the wall charger when not in use. It charges at 0.05A so they can stay there forever if needed. Then if they get low while Im at the track I just stick them on the Accucel and give them a boost, but I still get a good 4 hours without needing any charge at all.