XPower batteries are well known for their reliability and quality.  It's not surprising that at any track and airfield

you will find these batteries in cars, planes and helicopters.  XPower boasts low internal resistance and match cells during manufacture to ensure the highest performance.

For your safety and those of others please ensure you follow LIPO battery safety.

Do no charge batteries unattended.
Transport and charge batteries in a LIPO safe bag.
Do not over charge  batteries.
Use a LIPO compatible charger.
Do not over discharge batteries. (recommend 3.3v per cell max)
Do not charge warm batteries, let them cool to room temperature.
Balance your Batteries if more than 1S.