Smart Lithium-ion Battery Module 61mAh T4.1 x W8.5 x L31.5 mm (After 500 cycles) Specification Value Unit Norminal Voltage 3.7 V Shipping Voltage 3.70 ∼ 3.95 V Norminal Capacity 61 mAh 0.2C Discharging Minimum Capacity 58 mAh 0.2C Discharging Maximum Charging Voltage 4.2 V Standard Charging Current 0.5 C =29mA Maximum Charging Current 1 C =58mA 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 =58mA over 80% at 0.5C Discharging Operation Temperature Range Standard Charging Standard Discharging Dimensions（Actual size） L:31.5mm W:8.5mm REAR SEL360829 is a Li-ion battery which is suitable for Bluetooth devices like a headset product by 61mAh capacity. It is achieved less than 8.5mm wide and 4.1mm 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:4.1mm 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 40.0 Capacity /mAh 60.0 3.0 80.0 Charge: CC/CV 4.2V, 0.5C, 0.05C-cut off, 25˚C Discharge: CC:0.2C 3.0V-cut off Temperature Characteristics 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 80.0 80.0 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 60.0 3.8 3.2 Capacity /mAh 40.0 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 40.0 Capacity /mAh 60.0 80.0 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