Power Batteries 18650 2S1P 7.4V 2000mAh 2600mAh 5C Lithium Ion Battery Pack With MSDS/UN38.3

Characteristics

Nominal voltage 7.4V, composed of two 3.7V 18650 cells connected in series.

Operating voltage range: 6.0V (discharge cutoff) - 8.4V (full charge voltage), with stable voltage output and no significant fluctuations.

Typical charging cutoff voltage: 8.4V, requires a dedicated 2S lithium battery charger.

Capacity and Discharge Characteristics: Nominal capacity 2000mAh (measured value at 0.2C discharge rate), actual capacity slightly decreases with increasing discharge current.

Continuous discharge capacity at 5C rate is approximately 90%-95% of the nominal value, meeting the battery life requirements under high load.

The discharge curve is smooth, with a slow voltage drop rate in the mid-to-late stages, indicating strong device stability.

Rate and Current Parameters: Continuous discharge rate 5C corresponds to a maximum continuous discharge current of 10A (2000mAh × 5).

Instantaneous pulse discharge current can reach 15A (within 10 seconds), suitable for the instantaneous high power demands during device startup.

Recommended charging rate: 0.5C-1C, i.e., 1A-2A charging current, balancing charging efficiency and cell lifespan.

Cycle and Degradation Performance: Standard charge-discharge cycle life is 500-1000 cycles; the battery reaches its lifespan when capacity decays to 80% of the nominal value.

At high-rate (5C) discharge, the cycle life is approximately 70%-80% of that at 0.5C discharge; proper use can extend lifespan.

Internal Resistance and Consistency: Typical internal resistance of a single cell is 20-40mΩ; the total internal resistance of the battery pack is ≤100mΩ (including connection resistors and protection board).

Good cell consistency; after being connected in series, the current is evenly distributed during charging and discharging, eliminating the risk of overcharging or over-discharging individual cells.

Safety Protection Features: Built-in protection board with overcharge protection (8.45V±0.05V) and over-discharge protection (5.8V±0.1V).

Overcurrent protection threshold: 12-15A; short-circuit protection response time: ≤10ms, preventing excessive current from damaging equipment or battery cells.