CoinPower A4X Li-ion button cell

High-power rechargeable Li-ion button cells

VARTA CoinPower A4X rechargeable lithium-ion button cells offer a reliable high-power output, design flexibility, and very safe operation within a compact, lightweight round form factor.

The A4X follows the A4 series and comprises 3.7V micro batteries available in five diameters and three heights, offering low impedance and a maximum typical capacity of 149mAh. These batteries are ideal for energy-demanding devices such as wearables, portable (medical) devices, fitness trackers, and IoT applications, especially when space is limited.

 

All cell types have a cycle-life which is greater than 500 cycles, meaning they can be recharged and used again and again, making them a cost-effective and eco-friendly choice. Even at elevated temperature and high discharge currents these button cells show excellent performance.

 

The CoinPower A4X can be charged with different 3 charging rates: standard, fast and rapid. They are shipped in a state-of-charge of approximately 30% of their full capacity, which offers the best condition for long-term storage (shelf life exceeding 1 year) and a minimal self-discharge. To ensure complete traceability for every cell, each battery's lid and cup feature two data matrix codes.

 

Battery design options

To ensure perfect placement in your device VARTA offers these batteries in various battery design options.

 

 

Sample and pre-series quantities ex stock Texim Europe in 3 formats: naked cell, wired or PCB pins. Custom tag versions on request.

 


Key features
  • Wide capacity range (49 to 149mAh typ.)
  • High energy density, no memory effect
  • Low internal resistance
  • High discharge currents (up to 3C)
  • Fast charge capability: ready to go in 15 min.
  • Long life expectancy
  • Battery design options: naked, wired, various tags, customized 

Applications

Wearables

Portable equipment

Robotics

Medical equipment

IoT

  






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