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4.35V LG E1 - capacity tests at 4.35V and 4.20V

I've previously tested Sanyo UR18650ZTA and this time i've got anoother 4.35V cell - LG E1.
LG ICR18650 E1 4.35V Li-ion high voltage Li-HV 18650 battery cell capacity test

The battery was bought from my reliable supplier (Queen Battery) and tested with ZKETECH EBC-A20 and a self-made battery holder. It's a PC-connected battery tester supporting 4-wire measuring and discharging at up to 20A.

I've used version 3.0 of my battery holder based on 0.5mm thick pure copper terminals

I've followed all the prescriptions of the IEC61960-2003 standard concerning battery's capacity measurement. Before each discharging cycle each battery was charged at standard charge current mentioned in its datasheet to charge end voltage. Before each discharging or charging i've held a 1-1.5hrs pause. The environment temperature was 23.0-24.5°C. To be sure in results i've done each test minimum twice (usually 3-4 times).


LG ICR18650 E1

The cell is marked as LGABE11865 0247I048AB .
LG ICR18650 E1 4.35V Li-ion high voltage Li-HV 18650 battery cell capacity test

The main specs from LG E1 datasheet (pdf):
Nominal energy: 12.0Wh
Minimum energy: 11.6Wh
Nominal voltage: 3.75V
Standard charge current: 0.93A (0.3C)
Maximum charge current: 1.55A (0.5C)
Charge cut-off current: 50mA (100mA used)
Charge end voltage: 4.35V
Max. continuous discharge current: 4.65A (1.5C)
Discharge cut-off voltage: 2.75V
AC impedance at 1KHz: ≤70mΩ
Max weight: 49g

Measured initial DC IR at 3.1A in fully charged condition was 56±3mΩ

Measured weight of the tested cell was 47.52g
LG ICR18650 E1 4.35V Li-ion high voltage Li-HV 18650 battery cell capacity test

LG E1 capacity test results
At 4.35V charge:
LG ICR18650 E1 4.35V Li-ion high voltage Li-HV 18650 battery cell capacity test
The nominal energy at 0.2C doesn't reach 12Wh declared and the capacity is a bit higher than 3000mAh. Look at the 5A curve - it's really a heavy load for this guy. I'd not discharge it at more than 2A.

At 4.20V charge:
LG ICR18650 E1 4.35V Li-ion high voltage Li-HV 18650 battery cell capacity test
At 4.2V charge the capacity goes down to 2600mAh. The character of curves remains the same, just the numbers get lower.


COMPARISON

Let's check how much we lose by using 4.2V charge instead of 4.35V.
At 0.2C/0.62A:
LG ICR18650 E1 4.35V Li-ion high voltage Li-HV 18650 battery cell capacity test
Here we lose 13% in capacity and 14% in energy.

At 2A discharge:
LG ICR18650 E1 4.35V Li-ion high voltage Li-HV 18650 battery cell capacity test
The same 13 and 14%.

At 5A:
LG ICR18650 E1 4.35V Li-ion high voltage Li-HV 18650 battery cell capacity test
We lose 12% in capacity and 13% in energy.

So in general we lose about 13-14%.

LG E1 didn't show any fantastic results. It's real capacity appears to be about 3000mAh and 5A discharge seems to be too much for this cell. E1 could be interesting for those who need a high voltage cell for low drain (up to 2A) applications.

Here is the video version of this review:
LG ICR18650 E1 4.35V Li-ion high voltage Li-HV 18650 battery cell capacity test

Check out my YouTube channel for batteries, chargers and other stuff reviews.

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