* C rating : the higher, the higher current you can draw http://www.rcheliwiki.com/C_rating
* Balancing: Cells need to be a the same charge level so we can avoid overcharging.
** It's a good idea to always use the balance mode to charge a multiple cells battery
** http://www.rcheliwiki.com/Balance_charger
** Use the charger to check and rebalance cells https://www.youtube.com/watch?v=AChoy_PsVEg