Test/review of E-Stream ES18650-29MP 2900mAh (Green) 2021

E-Stream ES18650-29MP 2900mAh (Green) 2021







Official specifications:

  • Capacity Nominal: 2900mAh

  • Capacity Minimum: 2750mAh

  • Nominal Voltage: 3.7V

  • Discharge cut-off voltage: 2.75

  • Maximum charge voltage: 4.2V

  • Intern impedance: <=28mOhm

  • Standard charge current: 1.425A

  • Standard charge cut-off current: 142.5mA

  • Maximum continuous charge current: 2.9A

  • Maximum pulse charge (<2s): 5.7A

  • Standard discharge current: 2.85A

  • Maximum continuous discharge current: 10A (With 60°C cut-off)

  • Maximum pulse (<1s) discharge current: 15A (With 60°C cut-off)

  • Cycle life: 1000 cycles to 80%


A 2900mAh LiIon battery with moderate current rating.





















The two cells is fairly well matched and the cells can deliver the rated 10A















































Conclusion



The batteries looks fine, they do not set any records in either capacity or current, but are more average.







Notes and links



The batteries was supplied by E-Stream for review.



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

Thanks for your review. Would only buy these cells if their price was below average.

spec…
1000 cycle life…
2.9 amp charging…
Those two numbers are way above average. They are claiming the charging rate is above the standard discharge rate.?

A maximum charge rate of 1C is nothing special. The 1000 cycles is higher than the usually 400-500 cycles.

How believable is that claim from a fairly no-name manufacturer?

IIRC Panasonic has some 3000 cycle rated cells, however they have very interesting discharge/charge specifications (e.g. charging termination voltage is just 4.05V or something weird like that).

Thanks HKJ!

Ok 30Q as a Max charge rate of 4 amps so yeah 2.9a is nothing special for a 3000mha 18650

You (and I) do not know who manufactured the battery. The reduced performance may be due to the higher charge cycle count, but that is just a random guess.

How are max cycles assessed? If I am not mistaken cycle life will improve significantly if a battery is not fully (dis)charged, e.g. 3.50V - 4.10V.

If nothing is specified it is usually using standard charge and discharge, the data sheet for this cell do specify that is the case.