Dont take this as gospel as there are many people that know far more about it than myself, but as a rule i do the following
Balance charge whenever possible as a 7.4v lipo is 2 cells balance charging will maintain both cells are charged the same usually to around 4.2v per cell.
I usually balance charge the day before, then top them up on race day.
NEVER fully discharge a lipo this will cause permenant damage to the cells.
Brands as with many things tend to be much of a muchness, you can get cheaper packs that do the job just fine. If you go with the bigger brands LRP, Orion etc you know what your getting (but pay more for the privilege)
If your planning on running regional or national events you should check that the packs are BRCA legal.
Hope this helps
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