Batteries & Power Accessories

Relay Camera Couplers work in tandem with the Case Relay Camera Power System to keep your camera powered continually with an external 5V USB battery pack or wall power. The Relay Coupler is simply an insert for your camera battery cavity that enables powering the camera via Case Relay Camera Power System. The coupler does not contain a battery or hold a charge.

• For Canon Rebel T3, T5, T6, T7 Cameras

ProMaster batteries are a high quality, long lasting power source for your digital camera or camcorder. ProMaster replacement batteries are manufactured to meet or exceed the equipment manufacturer's specifications.

The BP-U35 is a 35-Wh capacity lithium-ion battery optimized for professional video shooting.

• For Sony Alpha a9 II, a9, a7R IV, a7R III, a7 III, and a6600 Cameras

• Dimensions: 80 mm x 58 mm x 25 mm
• Weight: 61 g
• Input DC 5 V 2.2 A (Min) via USB-A port
• Output DC 4.2 V 
• Output current 600 mA

Charging time is approximately 3 hours 30 minutes from depleted to 100% for 2 batteries charging simultaneously.

• Voltage: 3.7 V
• Capacity: 710 mAh
• Dimensions: 41 mm x 35 mm x 6 mm
• Weight: 18 g

• Voltage: 7.4 V
• Capacity: 1900 mAh / 14.1 Wh
• Dimensions: 57 mm x 39 mm x 21 mm
• Weight: 80 g