Rechargeable Button Cell Battery Varta CP 300 H NiMH 300 mAh 1.2 V

Rechargeable Button Cell Battery Varta CP 300 H NiMH 300 mAh 1.2 V is a compact rechargeable energy source engineered for small electronic devices that need a reliable low-voltage supply. The cell uses nickel-metal hydride (NiMH) chemistry to deliver a nominal voltage of 1.2 V and a rated capacity of 300 mAh, enabling repeatable charge cycles and consistent output over time. Its button cell format and modest dimensions make it suitable where space is limited and rechargeability is preferred over single-use alternatives.

Advantages

The NiMH chemistry provides a stable discharge curve and allows multiple recharge cycles, reducing waste compared with disposable button cells. The nominal 300 mAh capacity balances runtime and compact size for devices with low to moderate current draw. The cell's consistent 1.2 V output supports predictable device performance. Designed by a recognized battery manufacturer, it is intended to meet typical safety and reliability expectations for rechargeable button cells used in consumer and professional equipment.

Suitable for

• Wrist and wall clocks requiring small rechargeable cells
• Small sensors and wireless transmitters with low power consumption
• Portable medical devices where compact rechargeable power is needed
• Handheld electronics such as remote controls, toys, and measurement tools

Key specifications

• Chemistry: Nickel-metal hydride (NiMH)
• Nominal voltage: 1.2 V
• Nominal capacity: 300 mAh
• Form factor: Button cell (compact round cell)
• Rechargeable: Yes, designed for multiple charge/discharge cycles
• Typical discharge behavior: Stable voltage under low to moderate current draw

How to use

Install the button cell in the device observing correct polarity. Use a charger compatible with NiMH button cells or follow the device manufacturer's instructions if the device includes an internal charging circuit. Charge the cell fully before first use and avoid deep discharge where possible to prolong cycle life. Replace the cell when the device no longer reaches required operating times or when voltage under load becomes insufficient.

Recommendations

Store the battery in a cool, dry place and avoid prolonged exposure to high temperatures. Use a charger that detects NiMH chemistry and provides appropriate charge termination to prevent overcharging. For devices that remain unused for extended periods, remove the battery to avoid self-discharge effects and potential leakage. Follow local regulations for recycling or disposal of rechargeable batteries.