... testing all the rechargeable battery (as Ni-MH battery, Ni-CD battery, Lithium-ion battery and polymer batter, etc. --battery tester/load tester )The button cell battery tester provides most applications ... used to test rechargeable battery (as Ni-MH battery, Ni-CD battery, Lithium-ion battery and polymer batter, etc. ), phone battery, and so on.2. Button cell battery tester's internal ...