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A  nickel-cadmium (Ni-Cd) battery pack  is a type of rechargeable battery that has been widely used for many years. It is known for its reliable performance and ability to withstand frequent charging and discharging cycles. This particular NiCd battery pack has a voltage of 3.6 volts and a capacity of  1200mAh . This means it can provide a steady supply of power for a range of devices, from portable radios to remote control toys. However, it's worth noting that  Ni-Cd batteries  have a lower energy density compared to newer battery technologies like lithium-ion, so they may not last as long between charges.  Nonetheless, for applications where reliability and durability are more important than high energy density, a  NiCd battery pack  like this one can be an excellent choice. Ni-Cd Rechargeable Battery Pack SC 1200mAh 3.6V Standard Charge Mode: 0.1C for 16 hours Cycle Life: ≥500 times Operating Temperature: (-20℃) - (+70℃) Storage Temperature: (-30℃) - (+60℃) Cell Dimension: 23 +

  Lithium Battery ICR18650 2000mAh 7.4V Cell dimension: 18±0.5(D) * 65±0.5(H) mm Nominal capacity: 2000mAh Minimum Capacity: 1950mAh Norminal voltage: 7.4V Standard charging method: 0.5C constant current to 4.2V, constant voltage 4.2V continue charging till current decline to ≤0.01C. Charge current: 0.5c/1000mAh; 1.0C/2000mAh Standard discharging method: 0.5C constant current discharge to 3.0V Operation Temperature and relative humidity Range:  Charge: 0~45℃, 60±25%R.H. Discharge: -20~60℃, 60±25%R.H. Storage temperature for a long time: -20~25℃, 60±25%R.H. Rechargeable Lithium Battery Applications:  1. Toys 2. Smoke alarm 3. Electric scales 4. Electric toothbrush 5. Wireless doorbell 6. Remote controller 7. Electronic instrument 8. Electronic thermometer 9. Cordless telephone/Microphone etc. Performance Curves of Lithium Cell : 1.Lithium Cell Charge Curve (Charge at 1C)   2. Lithium Batteries Discharge Curve (Discharge at 1C ) 3. Lithium Cell Cycle Life Curve Battery Pictures: