Digital Battery Capacity Checker Tester Detector Battery Balance Discharger Servo Tester for LiPo Blue Item Type: Battery Detector Material: ABS Battery detector is a detection instrument that can detect the status of the battery, the detection battery type contains most rechargeable batteries. Battery types are Li Ion (Lithium Ion Batteries) Li Po (Lithium Polymers Batteries) Li Fe (Lithium Iron Batteries) Ni Cd (Nickel Cadmium Batteries) NiMH (Nickel Metal Hydride) Li Ion battery types (Li Po, Li Ion, Li Fe), without additional power supply battery detector can support 2S-8S. Test 1S lithium battery, then you need to access greater than 3S nickel batteries or UBEC 5V to NiCd or MH port to provide operating power for the battery detector. Nickel battery type (NiCd or NiMH), the battery detector can support 4S-8S without additional power supply. If you need to test nickel batteries smaller than 4S, you need to access 2-8S lithium battery to Lithium port to provide working power for the battery detector.