Originally Posted by Danny/SMC

You can use the same pack 40 times in a day if you want all it does is use up it's cycle life. So whether you run it 40 times in one day or 1 time a day for 40 days this is basically the same for the pack.

What I recommend is you have 2 packs as it's always good to have a spare plus if you go for practice days you can run a pack while the other is charging so basically you could be on the track all day long with very small delays between runs.

If you plan on being in RC a good charger with higher charging capabilities is a good thing. Your 4 channel charger is OK but in my opinion a charger with one channel that can do 12 to 20 amps is better.