Alphard Golf eWheels Club Booster V2 - Extra Battery Playing multiple rounds with no breaks? Impressive. You can purchase an additional battery to go the extra rounds. The Club Booster V2 battery is removable and can be easily switched. Simply swap out the battery for an immediate 100% recharge. - 5,200mAH at 36V - 27 to 36 holes capacity - Guaranteed 500 cycles - Overcurrent, over-heat, overcharge and discharge protection circuit