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A high-energy-density, high-current-capable, high-reliability rechargeable button cell

Note: This item is no longer supported by the manufacturer. We keep this article here for completeness of related content.

Aside from its gold-plated metal casing, Renata Batteries’ ICR2430 rechargeable lithium-ion button cell seems rather unassuming at first glance. When reading more, however, one finds that this is no ordinary battery. Thanks to its special ‘stacked electrodes’ technology, the internal resistance of these devices is significantly reduced when compared to standard button cells, which means higher charging and discharging currents can be achieved, a maximum of 100 mA and 200 mA respectively!

With a nominal voltage of 3.7 V and a nominal capacity of 100 mAh, Renata’s ICR2430 is characterised by high energy density and cycle stability across its entire service life, with outstanding reliability. After 500 charging/discharging cycles and in ordinary use, it will still have a residual capacity of over 80%, and thanks to its mechanical construction as a button cell in a metallic housing, the ICR2430 is perfect for applications where a great deal of mechanical stress is expected – What would you expect for a cell originally developed for the Tissot T-Touch Connect Solar smartwatch?

The device itself works with a charging voltage of 4.2 V (cut-off current 2 mA) and has a discharge cut-off voltage of 3.0 V. The temperature during charging is 0°C to 45°C, and the temperature during discharge is -20°C to 60°C, with a recommended storage temperature of 0°C to 45°C if storing units for more than 3 months. The standard packaging is 24.5 mm in diameter, 3 mm thickness, with a weight of 4.2 g, but after chatting to Renata at Hardware Pioneers Max, they told us that they can do board-mount and tabbed batteries for easier, flatter design integration, which is particularly handy for low-profile applications such as wearables. We also saw a battery that came attached to a small board that could have included the safety circuitry, not included within the standard cell. Better yet, Renata was keen to let us know that they are happy to work with small quantities of custom parts as they understand there is a market for their products in start-ups. As such, I have created an application form for a standard sample, but if you require any customisation, please detail it so that we are aware when contacting Renata.

Keep designing!

Renata Batteries ICR2430 Rechargeable Li-ion Button Cell Sample

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