Match the cell count (voltage) to your car’s rated range, then pick capacity (mAh) for run time and a C-rating that supplies enough current. Most modern cars use LiPo.

LiPo packs are lighter, hold more power and deliver higher current, which is why racers use them. NiMH is cheaper, more forgiving and needs less careful charging.

Yes. LiPo packs must be balance-charged on a LiPo-capable charger. Using the correct charger and settings is essential for safety and pack life.

Store LiPo packs at storage voltage (around 3.8V per cell) in a cool place and a safe bag. Never leave them fully charged or fully flat for long periods.