This kit includes two NP-F770 replacement Li-Ion batteries and a dual charger. 

• Charges 1 or 2 NP-F type batteries
• Works at home or in the car (includes AC cord and 12 V car cord)
• 2 charging levels. Low or High
• USB output port can also charge small devices
• Charges 1 NPF-770 battery in about 6 hours - Low | 4 hours - High
• Charges 2 NPF-770 batteries in about 11 hours - Low | 8 hours - High

Batteries

• 7.4 V
• 4400 mAh
• 32.5 Wh