Button cell battery Varta V3/250H-SLF 3.6 V 250 mAh — lithium rechargeable

Varta V3/250H-SLF is a rechargeable lithium button cell battery with a nominal voltage of 3.6 V and a rated capacity of 250 mAh. It is engineered for compact electronics that need a stable low-current power source over long periods. The battery’s rechargeable chemistry and small form factor make it suitable for memory backup, real-time clocks, sensors, and other devices where occasional charging is preferable to frequent cell replacement.

Advantages

The battery provides a consistent 3.6 V output with a 250 mAh capacity, offering reliable energy for low-current applications. Rechargeable lithium chemistry reduces waste and long-term cost compared with disposable primary cells. Its compact button cell design allows installation in cramped device housings while maintaining stable voltage over a wide temperature range. The cell is designed for prolonged standby use and multiple charge/discharge cycles, helping ensure continuous operation of memory and timing circuits.

Suitable for

• Memory backup in electronic modules
• Real-time clocks and calendar backups
• Low-power sensors and wireless transmitters
• Small medical devices requiring stable standby power
• Industrial control modules with limited space

Key specifications

• Nominal voltage: 3.6 V
• Rated capacity: 250 mAh
• Chemistry: rechargeable lithium
• Cell type: button cell
• Typical application: low-current standby and backup power

How to use

Install the battery according to the device manufacturer’s polarity markings, ensuring correct orientation and secure seating in the battery holder. Use a charger specified for rechargeable lithium button cells and follow recommended charging currents and voltages to avoid overcharging. Monitor battery performance during initial cycles; capacity will stabilise after a few charge/discharge cycles. Replace the battery when run-time no longer meets device requirements or if physical damage is visible.

Recommendations

Store and operate the battery within the device-recommended temperature range and keep contacts clean and free of corrosion. Avoid using chargers or equipment not designed for rechargeable lithium cells. Dispose of or recycle the battery according to local regulations for lithium-containing cells.