Rechargeable Button Cell Battery Varta V18HRT NiMH 19 mAh 1.2 V

Rechargeable button cell Varta V18HRT NiMH delivers a nominal voltage of 1.2 V and a usable capacity of 19 mAh in a compact cylindrical button format. It is engineered for small electronic devices that require a reliable, rechargeable low-voltage source. The cell offers stable output suitable for periodic power needs such as memory backup, timekeeping and low-drain sensors, and is designed to reduce waste compared with single-use primary button cells.

Advantages

This rechargeable NiMH button cell provides consistent voltage over its discharge curve and supports repeated charge/discharge cycles, reducing the need for single-use replacements. Its small form factor enables installation in confined spaces typical of watches, calculators and miniature electronics. The chemistry used gives a lower environmental impact compared with disposable cells when cycled appropriately, and it maintains reliable performance for low-current applications that demand long-term stability rather than high peak currents.

Suitable for (tasks / use cases)

• Memory backup in small electronic modules
• Watches and timekeeping devices
• Calculators and pocket instruments
• Low-drain sensors and transmitters
• Devices requiring repeated recharging and long-term maintenance power

Key specifications

• Chemistry: Nickel-Metal Hydride (NiMH)
• Nominal voltage: 1.2 V
• Rated capacity: 19 mAh
• Form factor: button cell (compact round cell)
• Intended use: low-drain, rechargeable applications

How to use

Install the cell observing correct polarity and ensuring firm contact with the device terminals. Charge the cell using a charger compatible with NiMH button cells and follow the charger's instructions regarding charging current and duration. For memory backup applications, insert the cell into the designated compartment and confirm the device recognizes the backup power. Avoid attempting to charge the cell in chargers designed only for primary (non-rechargeable) batteries.

Recommendations

Store the battery in a cool, dry place and avoid prolonged exposure to high temperatures. Use a charger designed for small NiMH cells and follow recommended charging currents to maximize cycle life. Replace the cell when capacity noticeably decreases or device operation becomes unreliable. Dispose of or recycle the cell according to local battery regulations.