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.
Applications:
Small Power Tools: Handheld drills, mini grinders, etc., requiring
instantaneous high-power motor drive; the 5C rate ensures
sufficient power for tool startup and operation.
Consumer electronics: High-end toy cars, drones, model airplanes,
etc., requiring 7.4V voltage to meet motor needs, with a 2000mAh
capacity balancing battery life and lightweight design.
Emergency and backup power supplies: Small UPS systems, emergency
lighting equipment, high-rate discharge for rapid response to power
demands, standardized battery cells for easy maintenance and
replacement.
Medical and testing equipment: Portable monitors, small analyzers,
etc., requiring stable voltage output and reliable discharge
performance to ensure accurate equipment operation.
Product Pictures:
