Test/Review of Aucooma IMR18650 2500mAh (Orange-green)

6 posts / 0 new
Last post
HKJ
HKJ's picture
Offline
Last seen: 2 hours 46 min ago
Joined: 05/24/2011 - 12:23
Posts: 7451
Location: Copenhagen, Denmark
Test/Review of Aucooma IMR18650 2500mAh (Orange-green)

Aucooma IMR18650 2500mAh (Orange-green)
DSC_4207
Official specifications:


  • Capacity Std. charge / discharge: 2500mAh
  • Nominal Voltage average of Std. Discharge: 3.70V
  • Standard Charge: Constant current: 1250mA, Constant voltage: 4.20V, End current(Cut off): 50mA
  • Fast Charge: Constant current: 4000mA, Constant voltage: 4.20V, End current(Cut off): 100mA
  • Max. Charge Voltage: 4.20V
  • Max. Charge Current: 4000mA
  • Standard Discharge: Constant current: 500mA, End voltage(Cut off): 2.5V
  • Fast Discharge: Constant current: 10000mA, 20000mA, End voltage(Cut off): 2.5V
  • Max. Discharge Current: Continuous discharge: 35000mA
  • Weight Approx.: Max. 48.0G
  • Operating Temperature: Charge: 0 ~ 50°C, Discharge: -20~ 75°C
  • Storage Temperature: 1 month: -20 ~ 60°C, 3 months: -20 ~45°C, 1 year: -20 ~ 20°C
  • Dimension: (D)18.3 + 0.2/-0.3 mm, (H) 66.0 ± 0.2 m

Aucooma%20IMR18650%202500mAh%20(Orange-green)-info
High current cells with moderate capacity.
DSC_4205 DSC_4206
DSC_4208 DSC_4209
DSC_4210
DSC_4211
DSC_4212
Aucooma%20IMR18650%202500mAh%20(Orange-green)-Capacity
Discharge curve tracks very nicely and keeps nearly constant capacity up to 20A.
The vertical line at the end of the curve is because I have stopped the discharge, but is still recording, i.e. it shows maximum temperature (gray line) and how much voltage the cell recovered (Red line).
Aucooma%20IMR18650%202500mAh%20(Orange-green)-Temp-15.0
Aucooma%20IMR18650%202500mAh%20(Orange-green)-Temp-20.0
The cell gets warm at 20A discharge, maximum temperature is just below 80°C
Aucooma%20IMR18650%202500mAh%20(Orange-green)-Temp-30.0
At 30A the temperature goes slight above 90°C.
Aucooma%20IMR18650%202500mAh%20(Orange-green)-CapacityTimeHours
Aucooma%20IMR18650%202500mAh%20(Orange-green)-CapacityTime
Aucooma%20IMR18650%202500mAh%20(Orange-green)-Energy
Aucooma%20IMR18650%202500mAh%20(Orange-green)-PowerLoadTime
Aucooma%20IMR18650%202500mAh%20(Orange-green)-TripCurrent
Aucooma%20IMR18650%202500mAh%20(Orange-green)-Charge
Conclusion
This cell is one of the very good high current cells with decent capacity.
Notes and links
The batteries was supplied by Aucooma for a 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 18650 and other batteries

My website with reviews of many chargers and batteries (More than 1000): https://lygte-info.dk/

cabfrank
Offline
Last seen: 4 months 2 days ago
Joined: 11/19/2010 - 17:25
Posts: 3119
Location: northern california

As always, thanks for the review.
So guys, I didn’t compare graphs, but what are we thinking here, maybe HE2s?

gadabout
Offline
Last seen: 3 months 2 weeks ago
Joined: 08/17/2012 - 23:11
Posts: 888
Location: Melbourne, Australia
cabfrank wrote:
As always, thanks for the review. So guys, I didn’t compare graphs, but what are we thinking here, maybe HE2s?

Compared ‘em
Almost identical to HE2s it seems. In fact, just a whisker better.

I’m surprised no-one else has commented.
Do we know who is selling these?

cabfrank
Offline
Last seen: 4 months 2 days ago
Joined: 11/19/2010 - 17:25
Posts: 3119
Location: northern california

Good to hear. HE2s are still great cells.

MRsDNF
MRsDNF's picture
Offline
Last seen: 5 months 2 weeks ago
Joined: 12/22/2011 - 21:18
Posts: 13473
Location: A light beam away from the missus in the land of Aus.

Amazon has them.

 

djozz quotes, "it came with chinese lettering that is chinese to me".

                      "My man mousehole needs one too"

old4570 said "I'm not an expert , so don't suffer from any such technical restrictions".

Old-Lumens. Highly admired and cherished member of Budget Light Forum. 11.5.2011 - 20.12.16. RIP.

 

Speed4goal
Offline
Last seen: 1 year 2 months ago
Joined: 06/11/2016 - 13:03
Posts: 1204
Location: Bay, St. Louis Mississippi

Anyone compared these to Samsung 25r graph or is the consensus they are LG he2?

One thing I’ve noticed on most websites is that name brand cells are cheaper then the rewrap brands. You would think the rewrap would be cheaper then the name brands. But they are $1-3 more per cell. Only rewrap I have are my 26650 because I’m not aware of any big manufacturer that’s selling them under their name. But one of them has to be making them.

2/9 Fox Co (2009-2015) Semper Fi 0311/0331 Rifleman/Machine Gunner
Blf has changed a lot since I've been here. Lots of snow flakes and easily offended over nothing. When the forum use to be great and people joked around and could take a joke. It's a forum it's not that serious. Let's make BLF great again!