[Dandare]

Capacity means the same as NiMh's is, 5000Mah etc

Race buggy packs are generally 2cell (eg, "2S"), but you can get 1 cell (2S), 3 cell (3S) & 4 cell (4S) packs.

The "C" number is the packs discharge rate (the higher this number the more 'punch' the pack will offer so, a 25C pack will have less 'punch' than a 90C pack.

During charging you'll normally charge at a rate of 1A ie, if you have a 2500Mah pack you'd normally set the charger to charge at 2.5A, a 5000Mah pack can be charged at a rate of up to 5A etc. You can charge a 5000Mah pack at a lower rate eg, 3A, it'll just take longer but you shouldn't charge at too higher rate eg, a 3000Mah pack at 5A.

You should never over discharge lipos ! Each cell is 3.7v (so a race pack being a 2 cell, or '2S' is 7.4v) When a 2S pack is fully charged it'll actually peak at around 8.4v (4.2v/cell), your ESC should have a low voltage cut off function normally set around 3.6v (per cell) to prevent the pack from being damaged permanently. A 5min race with a 2wd running a 5000Mah/30c pack & 7.5T motor will see the pack typically drop to roughly 7.8-8v (3.9v-4v/cell). You should make sure you're ESC has a low voltage cut, if not you can buy a seperate 'lvc' switch.

Regarding storage, people say different things, I tend to store them at a 'post race' voltage ie, 7.8-8v/pack.

Hope this helps.