Rechargeable NiMH Button Cell Varta CP300LF 1.2V 300mAh

Rechargeable NiMH Button Cell Varta CP300LF 1.2V 300mAh is a compact, low-voltage rechargeable cell intended for small electronic devices that require a reliable, repeatable power source. The cell supplies a nominal voltage of 1.2V and a capacity of 300mAh, offering steady output over its discharge curve. Its button cell format and nickel‑metal hydride chemistry make it suitable where space is limited and frequent replacement of primary cells would be impractical.

Advantages

This rechargeable button cell provides consistent voltage during discharge and can be reused many times, reducing overall waste compared to single‑use alternatives. Its NiMH chemistry allows for relatively stable performance across low-drain and intermittent-load applications. The compact form factor supports installation in compact housings where cylindrical cells cannot fit, while the moderate capacity balances run time and size for a variety of small devices.

Suitable for

• Toys and miniature electronic gadgets
• Hearing aids, medical devices and monitoring equipment
• Sensors, remote controls and wireless transmitters
• Clocks, calculators and measurement tools
• Prototypes and low-drain embedded systems

Key specifications

• Cell type: Nickel‑metal hydride (NiMH)
• Nominal voltage: 1.2 V
• Capacity: 300 mAh (typical)
• Form factor: button cell
• Intended use: rechargeable, low to intermittent drain applications

How to use

Install the cell according to device polarity markings, ensuring correct orientation of the positive and negative contacts. Use a charger designed for NiMH button cells or a compatible NiMH charger with appropriate contacts and charge algorithm. Follow the charger manufacturer’s instructions for charge current and time; slow charging at a low current typically yields longer service life, while rapid charging should only be used if the charger supports temperature or delta‑V termination. Do not force the cell into enclosures that deform the housing and avoid shorting the contacts.

Recommendations

Store cells in a cool, dry place and avoid prolonged storage at high temperatures. For best cycle life, recharge the cell shortly after significant discharge rather than leaving it fully depleted. Dispose of end‑of‑life cells according to local regulations for rechargeable batteries.