VARTA expands CoinPower Li-ion microbattery series for Bluetooth and wireless applications

The expanded CoinPower series of lithium-ion rechargeable microbatteries from Varta Microbattery target Bluetooth, wireless, wearable, industrial, and medical applications. Now consisting of CP 1254 A2, CP 1654 A2, and CP 1454 A3 parts, the series supports a voltage level of 3.7 V and capacities of 50 mAh, 100 mAh, and 85 mAh, respectively. The devices include six patents, including the iLock system, which, with an efficient circular form factor, provides an energy density up to 30% higher than any comparable microbattery available.

The series has low self-discharge and reliable signal transmission at high pulse loads to ensure unparalleled dependability, an extended shelf life of more than one year, and a fast charge capability to provide hours of battery life in just 15 minutes of charging. Additionally, these button cells may be recharged over 500 full cycles while maintaining at least 80% of their initial capacity.

The CoinPower series of Li-ion rechargeable microbatteries meets the safety, reliability, size, and weight requirements of a broad spectrum of applications, including stereo and mono Bluetooth headsets, notebook bridging, wearable fitness monitoring and training devices, wireless sensor networks, energy harvesting backup, and medical and healthcare equipment, including insulin pumps. The series is also suitable for use in smart watches, digital and analog watches, electronic games and car keys.

The button cells are provided in diameters ranging from 12.1 mm to 16.1 mm, are 5.4 mm high, and weigh from 1.6 g to 3.2 g. They use the CC/CV (constant current-constant voltage) charging method and exhibit virtually no swelling over a lifetime due to their dent- and scratch-resistant stainless steel case. The CP 1254 A2 and CP 1654 A2 cells are certified to IEC 62133 and UN 38.3 standards, whereas the CP 1454 A3 cell's certification is pending.