Electronicdesign 7214 0422npdtsii
Electronicdesign 7214 0422npdtsii
Electronicdesign 7214 0422npdtsii
Electronicdesign 7214 0422npdtsii
Electronicdesign 7214 0422npdtsii

Coin-Type Lithium Rechargeable Battery Handles 85°C Power Backup

April 23, 2014
The MS920T raises the bar on operating temperature for lithium rechargeable batteries.

The MS920T raises the bar on operating temperature for lithium rechargeable batteries. Rather than the typical 60°C, Seiko Instruments’ coin-type battery operates at up to 85°C. To achieve that temperature watermark, the company leveraged its own sealing technology to meet indoor and outdoor and interior-vehicle applications. The MS920T keeps more than 95% of its initial capacity after 60 days of storage at that temperature (conventional-type batteries lose their capacity to 40% of initial capacity under the same conditions). Discharge characteristics will remain stable even after being overdischarged to 0 V. In addition, it can be charged and discharged more than 100 times with 100% depth of discharge, when the battery is charged and discharged at 3.3 to 2.0 V (estimated based on the design). Specifications include 3-V nominal voltage, 6.4-mAh nominal capacity, and 60-Ω internal impedance. Measuring 9.5 mm in diameter and 2.0 mm high, the battery will find homes in backup power supplies for memory real-time clocks in various electric devices.

SEIKO INSTRUMENTS USA INC.

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