Sample Shipments Begin for the SCD4532K, a Constant-Voltage Charging Model of the Oxide-Based Small All-Solid-State SMD Battery SoLiCell® - Ideal for RTC Backup and Energy Harvesting Applications -

Dec. 19, 2025 FDK CORPORATION

FDK CORPORATION (Tokyo Stock Exchange Standard Market: Code 6955) has developed the new "SCD4532K" model, which supports constant-voltage charging, following the high-energy-density "SCC4532K" model of its oxide-based small all-solid-state SMD battery "SoLiCell®" previously unveiled at exhibitions. Sample shipments commenced in December 2025.

"Oxide-based small all-solid-state SMD battery SoLiCell® SCD4532K"

FDK has developed "SoLiCell®," an oxide-based, all-solid-state SMD battery that offers a compact size, high voltage, high energy density, enhanced safety, and environmental friendliness. Samples are currently shipping. The new model features expanded charging temperature and voltage ranges, enabling "constant-voltage charging" with simplified circuitry. It maintains the high temperature stability of previous models while delivering enhanced convenience. This eliminates the need for high-precision voltage control in the charging circuit, reducing component count and cost while contributing to device miniaturization. While maintaining the same 3V output and high weather resistance as previous models, the addition of new features enables broader application across various fields and environments, such as RTC backup and charging via energy harvesting. In addition, sample shipments of the high-energy-density model "SCC4532K," which was introduced prior to this model, are continuing in parallel. - Features - Specifications Features Product number SCD4532K SCC4532K Model Constant-voltage charging High-energy-density Dimensions L 4.5 x W 3.2 x T 1.4 mm Small SMD type (Reflow soldering compatible) Nominal voltage, capacity 3V 0.1mAh 3V 0.15mAh High voltage, high capacity Energy density 12mWh/cm3 22mWh/cm3 High energy density Operating temperature range -20 - +105℃ Wide temperature range Composition materials Non-combustible materials and oxide-based ceramic sintered bodies High stability, no sulfide use - Applications - Small IoT devices Wearable devices Backup power for RTC (Real-Time Clock) Backup power for SRAM/MCU, etc. Combination with energy harvesting devices Communication devices used in harsh environments such as high temperatures and vacuum, etc. FDK will continue to pursue higher capacity and higher output for this product and strive to expand its applications further.

[Contact] FDK CORPORATION (U.S.A., Europe) Sales Dept. 3, Sales Group (Asia, Other) Sales Dept. 4, Sales Group Tel: +81-3-5715-7434

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