I really don't understand why the pcc relies on the lid to put pressure on the battery in order for it to make contact to charge. Wouldn't it make more sense to have it screw in? I've had my pcc for my 510 for a little less then a month and I already have to ghetto-rig it with a rubber band in order to get it to charge my batteries. And unfortunately, its the only charger I have, so I have to use it constantly. Wish I'd gone with a regular charger in the first place.