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63074

Product catalog summary

Type Designation and Specifications
The CoinPower® CP 7840 A3 is a lithium-ion battery with a type number of 63074 and cell code ICR7840. It operates on a graphite-layered metal oxide system (LiNixMnyCozO2) and has UL recognition under MH13654. The nominal voltage is 3.7V, with a typical capacity of 16mAh at 0.2C from 4.2V to 3.0V at 20°C.

Dimensions and Weight
The battery has a diameter of 7.8mm and a height of 4.0mm, with a weight of approximately 0.7g.

Charging and Discharging
The charging method is constant current plus constant voltage, with a charge voltage of 4.20 ± 0.05V. The initial charge current is 8mA, with a charging cut-off by time at 5 hours or by minimum current at 0.32mA. The discharge cut-off voltage is 3.0V, with a maximum pulse discharge current of 32mA for 2 seconds and a maximum continuous discharge current of 16mA.

Temperature and Storage
The operating temperature range for charging is 0 to 45°C, and for discharging, it is -20 to 60°C. The storage temperature allows for a capacity recovery rate of over 90% after 1 year at -20 to 20°C and 3 months at -20 to 45°C.

Impedance and Cycle Life
The initial impedance is less than 1Ω at 1kHz. The cycle life is over 500 cycles at 0.5C/0.5C, 20°C, maintaining more than 85% of the initial capacity.

Safety and Approvals
The battery has passed UN 38.3 and IEC 62133 safety tests. It also passed the internal overcharge test (12V, 1.5C, 12h).

Recommendations and Patents
It is recommended to follow handling precautions and use external safety electronics (PCM). The battery is protected by several patents, including US 6066184 A and EP 2628203 B1.

Catalog excerpts

Data Sheet CoinPower® CP 7840 A3 Data Sheet - CP 7840 A3 (CoinPower®)1 Type Designation Type Number Cell Code System UL Recognition Nominal Voltage [V] 3.7 (average) T ypical Capacity C [mAh] 16 (at 0.2C from 4.2 V to 3.0 V at 20 °C) Constant Current + Constant Voltage 4.20 ± 0.05 Standard Charge: 8 Charging Cut-Off (a) or (b) a) by time [h] Standard Charge: 5 b) by min current [mA] 0.32 Discharge Cut-Off Voltage [V] 3.0 Max. Pulse Discharge Current [mA] 32 @ 2s Max. Continuous Discharge Current [mA] 16 Operating Temperature [°C] Storage Temperature Capacity Recovery Rate2 [%] Impedance Initial [Q] < 1 @ 1kHz Cycle Life 0.5C/0.5C, 20 °C3 [Cycles] >500 (> 85% of Cini) Safety UN 38.3 passed relevant tests acc. IEC 62133 passed Internal Approval Overcharge T est (12V, 1.5C, 12h) passed 1 Recommendations regarding Charging/Discharging and Safety (cf. Handling Precautions/Advanced Product Information) have to be accepted. Cell must not be used without external safety electronics (PCM - Protection Circuit Module)! The CoinPower cell may exclusively be used for the intended purpose. For medical applications please contact VARTA Microbattery. This product is protected by at least one of the following patents: US 6066184 A,US 9178251 B2,US 9231281 B2,US 8586232 B2,US 9153835 B2,CN 102318122 B,CN 102804473 B,EP 2628203 B1,EP 2443691 B1,EP 2415101 B1,EP 2394324 B1,JP 5767115 B2,DE 19647593 B4. 2 After storage at initial cell voltage of 3.6 to 3.7 V / cell 3 typical values Subject to change without prior notice!

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