UltraFire CN18650 9800mAh (Yellow)
- Voltage: 3.7V
- Capacity: 9800mAh
- Lifetime: 1000 cycles
A cheap battery with serious overstated capacity.
The CELLS can deliver about 1A, at 2A they start to loose voltage and at 5A they cannot really do anything.
The two cells matches fairly well, this probably means the battery is manufactured this way, i.e. it is not a old rewrapped cell.
The cell is as expected, this means low capacity and not able to deliver much current.
The protection specified on the wrapper is not included, this is a bare cell.
Notes and links
How is the test done and how to read the charts
How is a protected LiIon battery constructed
More about button top and flat top batteries
Graphical comparison to 18650 and other batteries
Table with all tested LiIon batteries