Efest IMR18490 1100mAh (Red)
- Nominal Voltage: 3.7v
- Battery Model: 18490 Capacity: 1100mAh
- Positive: Nipple Top
- Cycle Life:500 Cycles
- Weight: 45g
- Dimensions: 48.89mm (L) x 18.19mm (D)
The battery is a slightly short verions of a 18500 battery and because it is IMR it does not have protection.
The rating of 1100mAh does fit very nicely with the measurements and the battery does also handle a 5A discharge current fine.
My test is discharging the battery and it cannot continue to deliver full current.
This cell works well at the currents I have tested.
At the current time I can only rate them acceptable, because Efest is a new company, and the batteries is not from one of the big brands.