ML2020 is a rechargeable lithium manganese dioxide (Li‑MnO₂) button cell designed for long‑term, low‑drain applications that require limited recharge capability. Unlike standard CR lithium cells, ML batteries can be recharged, but their capacity and cycle life are significantly lower than those of conventional lithium‑ion cells. This makes the ML2020 a specialized solution for real‑time clock (RTC) modules, memory‑backup circuits and industrial controllers that rely on continuous trickle‑charge operation.
The cell provides a nominal voltage of 3.0 V and a realistic capacity of approximately 40 mAh. The ML2020 offers low self‑discharge and a stable discharge profile, ensuring reliable operation over extended periods. It performs best in very low‑drain applications, and charging must follow manufacturer‑specified limits to prevent capacity degradation and maintain long service life.
Due to its higher internal resistance, the ML series is not intended for high‑current loads or strong pulse demands. The ML2020 is a long‑life, stable‑discharge cell designed for systems that require an energy buffer with periodic recharge capability, rather than high‑drain performance.
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