This is a 7.4V 800mAh 2S 50C hardcase LiPo battery EC2 by Dynamite.

• Application 1/18 Scale Surface
• Battery Balance Connector JST_XH
• Battery Capacity 300-999mAh
• Battery Type LiPo (3.7V per cell)
• Battery Voltage 7.4V
• Capacity 800mAh
• Connector Type EC2
• Discharge Lead Length 2.5″ (64 mm)
• Hard Case Yes
• Maximum Charge Rate 1C
• Maximum Continuous Discharge Current 50C
• Number of Cells 2
• Product Height 0.8″ (20 mm)
• Product Length 2.3″ (58 mm)
• Product Weight 2.11 oz (60g)
• Product Width 1.2″ (30 mm)
• Watt Hours 5.9Wh
• Wire Gauge 18 AWG