Test/Review of Keeppower IMR26650 5200mAh (Black) 2015

Keeppower IMR26650 5200mAh (Black) 2015

Official specifications:

  • Capacity min.: 5100mAh
  • Capacity typ.: 5200mAh
  • Nominal voltage: 3.70V
  • Charge voltage: 4.20+/-0.05V
  • Standard discharge cut-off voltage: 2.50V
  • Standard charge current: 2000mA
  • Charge termination current: 50mA
  • Standard discharge current: 5100mA
  • Max. continuous discharge current: 15A
  • Max. pulse discharge current: 30A

A high capacity and high current large cell from Keeppower.

The cells do not match completely, but works fine to deliver 10A.


I have tested a 5200mAh from Keeppower before with about the same result. The capacity is very good for a 26650 cell and it can deliver some current.

Notes and links

The batteries was supplied by Keeppower 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
Compare to 26650 and other batteries


Thanks for the good review, HKJ!

I have yet to acquire a light that will take a 26650, but I think that it’s going to be happening soon.

Thanks again! :slight_smile:


FAKE IMR claims by Keeppower.

Can you back that up with any proof?

I’m looking for 3 cells (in series) to power 3x XHP-50 in a large light. Potentially in direct drive.

I’m considering these, opinions?

i don’t know, but i thought an IMR battery would deliver more amps than this
i can’t post a chart of the mkne IMR 26650.
i’m gonna look at it if i can find it.

am i reading this right ?
internal resistance is .07 ohms ??

looks like old mkne 3500 imr outperform these from 10 amps on up to 30

They certainly aren’t ultra high performance cells, but they seem like a decent deal between maximum 26650 capacity and decent performance. Better than all other 5xxxmAh cells in the comparator that I could find.

Many brands and re-wrappers misuse the term “IMR” and they employ that word simply because so many people associate it it with “high discharge”, even when the battery chemistry is not LiMn2O4. I don’t know where or when did that begin but since a couple years ago people started looking specifically for “IMR batteries” because they think that means the cell will perform better. I believe AW had something to do with that because they pushed hard on the marketing for true IMR batteries, causing other brands to copy the strategy but with non-IMR cells.

I have to agree, at the right price, I won’t complain about 10 amps and 5200 mAhs.
although it is a little slimy of keeppower if this is not IMR.

what have these been priced at ?

Looks like around $13-15 per cell. Amazon prime has a two pack for $30.

that doesn’t sound like a great deal. I bought 4 Basen in the GB.

does anyone think these keeppowers are really fake IMRs ?

Looking for the best 26650 batteries for my L6 and not worried about price. Any suggestions :smiley:

These are recommended for L6

Perfect! :smiley: I have been looking at the Efest purple 4200 mah 35/50 amp, IMREN 5500 22/60 amp and the Keeppower 5200 20/30 amp batteries and wondering which one to pick. Hard when the L6 is my first 26650 flashlight and I know crap about these batteries. The Keeppower 5200’s it is :slight_smile: Thank you PineChaos! :smiley:

Majoroverkill, I'd pick LiitoKala 26650-50As and save some cash:

Best price/performance ratio in the market right now, with a helluva difference.

Cheers ^:)

Thanks :slight_smile: Just bought a set of these, IMREN IMR 26650 HIGH DRAIN 60A BATTERY 3.7v Rechargeable Li-MN 5500mAh. I’ll give them a try. Got two more 26650 flashlights in the mail. I will definitely give the LiitoKala a try. I can always use more batteries, Thank you Barkuti :smiley: The only 26650 batteries I have right now are the Soshine 5500’s and my L6 seems to suck them down fairly fast.