... : car key ,remote controls, audio and video equipment, electronic instrumentation, computer motherboards, memory cards, music cards, calculators, electronic watches and clocks ... electronics, IT,etc.Product features:1. ML2020 lithium button cell battery 2. Long shelf &working time 3. Competitive price with high ... H) 5. Perform temperature: -20 degree to 60 degree ML2020 rechargeable battery