Smart Lithium-ion Battery Module 43 mAh T3.7 x W9.5 x L28.0 mm (After 500 cycles) Specification Value Unit Norminal Voltage 3.7 V Shipping Voltage 3.70 ∼ 3.95 V Norminal Capacity 43 mAh 0.2C Discharging Minimum Capacity 40 mAh 0.2C Discharging Maximum Charging Voltage 4.2 V Standard Charging Current 0.5 C =20mA Maximum Charging Current 1 C =40mA Discharging Cut Off Voltage 3 V Maximum Discharging Current 1 C Internal Resistance 950 mOhm Cycle Life 500 Cycles 0 to 45 ̊C -20 to 60 ̊C Conditions 0.2C =40mA over 80% at 0.5C Discharging Operation Temperature Range Standard Charging Standard Discharging Dimensions（Actual size） L:28.0mm W:9.5mm REAR SEL320926 is a Li-ion battery which is suitable for Bluetooth devices by 43mAh capacity. It is achieved less than 9.5mm width and 3.7mm thickness which enables you to make fashionable product design. There is a protection circuit embedded in a small shape of the package. You can choose the connector available as option. TOP SIDE T:3.7mm Specification Charge: CC/CV 4.2V, 0.05C-cut off, 25˚C Discharge: CC 0.2C, 3.0V cut off, 25˚C Charge Characteristics 4.4 4.4 0.2C 0.5C 1.0C 4.2 4.0 Voltage /V 3.6 3.4 3.2 3.2 0 20.0 Temperature Characteristics Capacity /mAh 40.0 3.0 60.0 Charge: CC/CV 4.2V, 0.5C, 0.05C-cut off, 25˚C Discharge: CC:0.2C 3.0V-cut off 4.4 25˚C -20˚C -10˚C 0˚C 60˚C 4.2 4.0 Voltage /V 3.8 3.4 3.8 3.6 60.0 60.0 Charge: CC/CV 4.2V, 0.5C, 0.05C-cut off, 25˚C Discharge: CC:0.2C 3.0V-cut off, 25˚C 1cyc 10cyc 100cyc 300cyc 500cyc 4.0 3.6 3.4 40.0 40.0 3.8 3.2 Capacity /mAh Capacity /mAh 4.4 3.2 20.0 20.0 4.2 3.4 0 0 Cycle Characteristics Voltage /V Voltage /V 3.6 3.0 0.2C 0.5C 1.0C 4.2 4.0 3.8 3.0 Charge: CC/CV 4.2V, 0.5C, 0.05C-cut off, 25˚C Discharge: 3.0V-cut off, 25˚C Discharge Characteristics 3.0 0 20.0 Capacity /mAh 40.0 60.0 Specifications are subject to change without notice. Seiko Instruments Inc. Homepage http://www.sii.co.jp/small_lib/en Smart Enerty Busines Division 8, Nakase 1-chome, Mihama-ku, Chiba-shi, Chiba 261-8507, Japan Telephone:+81-43-211-1217 Facsimile:+81-43-211-8395 Seiko Instruments U.S.A.,Inc. Seiko Instruments GmbH Seiko Instruments Taiwan Inc. Seiko Instruments (Shanghai) Inc. Telephone:+1-310-517-7771 Telephone:+886-2-2563-5001 Telephone:+49-6102-2970 Telephone:+86-21-6375-6611 2-1502