— 21700 High Power
BIG CELL, BIG CURRENT
5500mAh in a 21700 that still pulses at 44A. High capacity and high power in the same can.
— Where it works
WHAT THIS CELL IS GOOD FOR
Each scene states the case for this cell and, just as plainly, the case against it. Knowing which cell not to buy is the point.
High-power tools in a 21700 form factor
An 8C pulse rating on a 5500mAh cell is what lets a 21700 pack replace a larger 18650 array in high-torque tools without losing run time.
Where it does not fit
Continuous discharge is 3C. This is a burst performer — sustained loads near the pulse figure will heat the cell well past its comfortable window.
Compact packs with real punch
Fewer, larger cells mean fewer interconnects and a simpler BMS while keeping peak current high enough for motor-driven gear.
Where it does not fit
The 300–500 cycle window is the shortest in the 21700 line. Repeated high-peak work wears this cell faster than a high-energy equivalent.
Balanced power-to-capacity builds
For packs that need both a respectable watt-hour figure and a strong current ceiling, this sits between the 60D's capacity and the 40T's outright power.
Where it does not fit
If your application is defined by a continuous current target rather than a burst, choose the cell whose continuous rating meets it — not the one with the biggest pulse number.
— The numbers that matter
INR21700-55P · 5500mAh
Capacity
Energy stored per cell. Multiplied across the pack, this is your run time.
Standard discharge
The current this cell can hold continuously. Match it to your load before anything else.
Pulse discharge
A short burst — motor start, takeoff, inrush. Not a sustained figure.
Cycle life
Charge/discharge cycles before capacity falls to the end-of-life threshold, at gentle duty.
Remaining ratings
- Nominal voltage
- 3.6V
- Max charge
- 4.2V
- Charge current
- 5.5A (1C)
- Energy
- 19.8Wh
- Energy density
- 271 Wh/kg
- Weight
- ≤73 g
Figures reflect NCM 21700 · High Power manufacturer specifications. Duty cycle, thermal management, and pack design all move the real numbers — confirm your intended load with Monachi before committing to a target.
— Compare the family
CLOSE CALLS IN 21700 HIGH POWER
— Order this cell
INR21700-55P
5500mAh · NCM 21700 · High Power
Add this cell to your cart, or send the selection straight to our sales team on Telegram. Prices shown are indicative starting prices — final B2B pricing, availability, and terms are confirmed by Monachi.
Indicative pricing (USD)
Not a final offer. Freight, duties, and payment terms are quoted per order — confirm with Monachi before you plan against these numbers.
3-month warranty on every cell. Defective cells are replaced.