Button-type Ni-Cd batteries (e.g., 1.2V cells in sizes like KRxx series) are ideal for compact, low-power applications where space is limited. Common uses include:
- Medical Devices – Hearing aids, glucose monitors.
- Backup Power – Memory backup in electronics.
- Small Electronics – Calculators, laser pointers.
Advantages:
- Space-saving design – Fits into tiny compartments.
- Reliable performance – Maintains voltage well under low drain.
- Rechargeability – Unlike disposable button cells.
Limitations:
- Lower capacity compared to lithium-based button cells.
- Memory effect if not properly maintained.
Despite competition from lithium cells, Ni-Cd button batteries remain useful in niche applications requiring durability and rechargeability.
