I got a few 7.2v 400 mah batteries for my slowstick, my question is how long will they stay chareged if I do not use them, the reason why is cause the weather here is so screwy. Can I charge thm say now, and not fly until next weekend? Any help would be greatly appreciated!

I don't think your answer can be answered exactly. I've flown packs that had been sitting for a month, but performance is pretty dismal. Nicad and nimh both loose a bit of voltage as they sit. There is a noticeable performance difference between a pack that's been sitting for a few days, and a pack that's hot off the charger.

Jason

What do you have for a charger? I ussually keep my batteries charged, then right before I go flying I put them on the charger and peak them again.

For NiCd's you should drain them totally or make sure they're peaked and still cycle them ounce every two weeks or more. Good luck!