89068RC Xtreme Battery Pack 800mAh  

The 2x 3.7 V, 800 mAh LiPo battery provides a constant discharge current of 10 C, sufficient power and capacity for reliable performance flights. Total combined output voltage is 7.4 V. Both cells are not connected with each other and therefore do not require a balancing plug. To best charge the standard battery pack, use the optional available OneStation charger or the default USB charger included with the Xtreme’s delivery content.

Specifications
Form factor: 2x single cells, 3.7 V packed into one battery pack
Combined voltage: 7.4 V
Capacity: 800 mAh, combined
Discharge current: 10 C, constant, 15 C burst
Charge current: 1 C
Weight: 1.6 oz (45.5 g)
Dimensions: 1.6 x 2.0 x 0.4 inch (40 x 50 x 10 mm)