No mention of charger or batteries being used. If you find your charger is not getting up to you new 2C amp setting, you need a more powerful charger. If your 4800mAh pack is a two cell LiPo, you'll need ≥ 81 watt charger to get your 9.6Amp setting 2C charging rate. If your 4800mAh pack is a four cell LiPo pack, you'll need a charger with ≥ 162 watts of power to get hit that 2C charge rate amperage.