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Rechargeable ML2020 button cell (3.0 V/40 mAh) lithium manganese battery for devices specifically designed for ML2020. Not suitable as a replacement for CR2020 (disposable) Typical applications: RTC backup in industrial electronics, certain motherboards, memory buffers, medical & meters, special remote controls with charging circuit. Please check the device manual Rechargeable - Reduces battery waste. Multiple charging cycles possible - ideal for devices with integrated charging circuit or trickle charging Technical data: Type: ML2020 · Voltage: 3.0 V · Capacity: 40 mAh · Diameter: 20 mm · Height: 2.0 mm Stable voltage for continuous operation and backup applications Use only in devices with ML2020 share. Do not short circuit, do not overload, do not damage. Keep away from children