Ni-Cd batteries experience self-discharge over time, meaning they lose charge even when not in use. This can be problematic for applications that require long-term storage or standby readiness, such as backup power systems.
Causes of Self-Discharge
Self-discharge occurs due to internal chemical reactions within the battery. Factors such as high storage temperatures, impurities in the electrodes, and prolonged disuse can accelerate this process.
Solutions and Prevention
- Store in Cool, Dry Conditions: Keeping batteries at moderate temperatures (below 25°C) slows the rate of self-discharge.
- Charge Before Storage: Storing Ni-Cd batteries at 40-50% charge reduces degradation.
- Periodic Recharging: If stored for long periods, Ni-Cd batteries should be recharged every 2-3 months to maintain their usability.
