2 Packs CNHL Speedy Pizza 1550mAh 14.8V 4S 100C Lipo Battery with XT60 Plug - UK Warehouse Ship_From:UK and can use an EC3

and can use an EC3 plug or a properly rated adapter

car or boat systems

8V 4S 40C Lipo Battery with EC5 Plug

It is easier to control than 3S

2 Packs CNHL Speedy Pizza 1550mAh 14.8V 4S 100C Lipo Battery with XT60 Plug - UK Warehouse Ship_From:UK and can use an EC3Specifications: Stock Number: 1551004PZ Capacity: 1550mAh Voltage: 14. 8V 4 Cell 4S1P Discharge Rate: 100C Continual 200C Burst Charge Rate: 5C Max Size(1 5mm difference): 35X34X77mm Approx Weight(5g) : 187g Output Connector: XT60 Balance Connector: JST XH Wire (AWG): 12# Package included: 2* CNHL Speedy Pizza 1550mAh 14. 8V 4S 100C Lipo Battery with XT60 Plug Compatible RC Models: CNHL FPV 1550mAh 14. 8V 4S 100C lipo battery compatible with Nemesis