This small NP-F batteries Capacity Meter Discharge Tester is used to test the remaining power of NP batteries
The capacity tester is also a great way of determining the current draw of your camera trap and will give you a good idea of how long your batteries will last.
Suitable for NP-F series battery NP-F550/570/750/770/960/970
Battery Charge Level Indicator Lithium Battery Capacity Meter Test Display LED Tester Voltmeter