Efest IMR 18490V2, 16340V2, 18350V1, 18650V1, 18500V2 test results.

Here are a few more of the efest batteries you might be interested.

You can get the result files here:

Efest IMR16340V2

Efest IMR18350V1

Efest IMR18490V2

Efest IMR18650V1

Efest IMR18500V2

Efest battery test coming soon.

New efest battery tests will be posted as soon as i have the results.

Batteries under test are:

e-fest 18490 1100mah 3.7V Limn battery-Nipple              

E-fest 18350 800mah 3.7V Limn battery-nipple

E-fest 18350 800mah 3.7V Limn battery-flat top

e-fest 18500 1100mah 3.7V Limn battery-Nipple

e-fest 18650 2000mah 3.7V Limn battery-flat top

e-fest 18650 2000mah 3.7V Limn battery-Nipple

e-fest 14500 700mah 3.7V Limn battery-Nipple

e-fest 16340 550mah 3.7V Limn battery-Nipple

TrustFire 16340 880mAh 1C test (one crappy battery)

Click on the picture for details.

Well this was a crappy one. This is a brand new trustFire 16340 battery. This unit only gave me 29% of the charge. Very poor characteristics and it gets heated up to 34 Celcius at 1C discharge rate.

Very poor performance and it didn't even make it for an hour. Note the weird charge curve too.

1. One Hour Discharge: Fail: Low capacity; Capacity=256,9 mAh (29,2% rated).

2. Lithium-ion Charge: Capacity=225,0 mAh (25,6% rated).

3. One Hour Discharge: Fail: Low capacity; Capacity=235,4 mAh (26,7% rated).

4. Li-ion 30% Charge: Capacity=220,1 mAh (25,0% rated).

First Discharge.

One Hour Discharge
  Duration (h:m:s): 00:17:32
  Load current: 879,0 mA
  Cut-off voltage: 2,750 V
  Battery discharged capacity: 256,9 mAh
  Battery discharged energy: 795,7 mWh
  Battery initial-point voltage: 3,741 V
  Battery mid-point voltage: 3,086 V
  Battery end-point voltage: 2,751 V
  Battery midpoint current: 878,8 mA
  Exit condition: Battery cut-off voltage reached.

Second Discharge

One Hour Discharge
  Duration (h:m:s): 00:16:04
  Load current: 879,0 mA
  Cut-off voltage: 2,750 V
  Battery discharged capacity: 235,4 mAh
  Battery discharged energy: 762,3 mWh
  Battery initial-point voltage: 3,934 V
  Battery mid-point voltage: 3,123 V
  Battery end-point voltage: 2,750 V
  Battery midpoint current: 878,6 mA
  Exit condition: Battery cut-off voltage reached.

Note: The temperature is unusually too high.