CTR chargers allow all the cells to be balanced as they charge to prolong battery life and performance. It charges at rates up to 20amps for quick charges between rounds. It comes standard in a protective waterproof case. The charger also has a extra power source, to power the car for cooling/data collection/tuning between rounds while the battery is charging, available as an upgrade.
Charger- $550
Power source upgrade- +$115