Test/review of A123 ANR26650M1B 2500mAh (Green)

7 posts / 0 new
Last post
HKJ
HKJ's picture
Online
Last seen: 7 min 43 sec ago
Joined: 05/24/2011 - 12:23
Posts: 6852
Location: Copenhagen, Denmark
Test/review of A123 ANR26650M1B 2500mAh (Green)

A123 ANR26650M1B 2500mAh (Green)
DSC_7329
Official specifications:


  • Nominal capacity: 2500mAh
  • Minimum capacity: 2400mAh
  • Call weight: 76g
  • Internal impedance: 6mOhm @ 1kHz
  • Recommended standard charge method: 1C (2.5A) to 3.6V CCCV, 45 min
  • Recommended fast charge method: 4C (10A) to 3.6V CCCV, 12min
  • Maximum continuous discharge: 70A
  • Maximum pulse discharge: 120A for 10s
  • Cycle life: >1000 cycles
  • Operating temperature: -30° ~ 55°C
  • Storage temperature: -40°C ~ 60°C

A123%20ANR26650M1B%202500mAh%20(Green)-info
This cell is fairly old, data sheet is from 2011, but even today its current capabilities are impressive. The capacity is not very impressive, but some of it is related to the chemistry (LiFePO4), it has lower capacity.
DSC_7327 DSC_7328
DSC_7330 DSC_7331
Watch out for polarity on this cell, the can is plus!
DSC_7332
DSC_7333
DSC_7334
A123%20ANR26650M1B%202500mAh%20(Green)-Capacity
This chemistry has a very flat discharge curve and the two cells are well matches and do not have any problems with 30A
A123%20ANR26650M1B%202500mAh%20(Green)-Temp-20.0
A123%20ANR26650M1B%202500mAh%20(Green)-Temp-30.0
The do not even get hot.
A123%20ANR26650M1B%202500mAh%20(Green)-CapacityTimeHours
A123%20ANR26650M1B%202500mAh%20(Green)-CapacityTime
A123%20ANR26650M1B%202500mAh%20(Green)-Energy
A123%20ANR26650M1B%202500mAh%20(Green)-PowerLoadTime
A123%20ANR26650M1B%202500mAh%20(Green)-TripCurrent
A123%20ANR26650M1B%202500mAh%20(Green)-Charge
Conclusion
These are impressive high current battery. The disadvantage of these batteries is lower voltage and capacity. Today it is possible to get better batteries in this chemistry.
Notes and links
Vapcell told me that I was missing some cells in my comparator and they would be happy to supply them.
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

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

Barkuti
Barkuti's picture
Online
Last seen: 4 min 35 sec ago
Joined: 02/19/2014 - 14:46
Posts: 4051
Location: Alhama de Murcia, Spain

Sorry but there's something wrong with this test: the reviewed cells were bad, for sure.

You already reviewed this cell in the past with the old station, dear Henrik: A123 26650 2500mAh (Green)

Let's take a comparative look at the discharge graphs:

 

From this review:

 

From the old review in the old, non 4 terminal (?) holder station:

 

The difference is appalling! 

 

Mooch also reviewed this cell 2¾ years ago: A123 ANR26650M1-B 2400mAh 3.3V 26650 Bench Test Results...an extraordinary battery, with issues

His main discharge graph:

 

 

Regards and cheers Smile 

Innocent

HKJ
HKJ's picture
Online
Last seen: 7 min 43 sec ago
Joined: 05/24/2011 - 12:23
Posts: 6852
Location: Copenhagen, Denmark
Barkuti wrote:

Sorry but there’s something wrong with this test: the reviewed cells were bad, for sure.

The cell may be a bit old, I do not see any other reason for this.

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

Shadowww
Offline
Last seen: 2 days 12 hours ago
Joined: 01/20/2012 - 19:09
Posts: 1338
Location: Northern Europe

It’s a shame A123Systems went out of business. Their LiFePO4 cells were quite ahead of their time.

hank
hank's picture
Offline
Last seen: 16 hours 24 min ago
Joined: 09/04/2011 - 21:52
Posts: 8126
Location: Berkeley, California

A few years ago when I asked someone at A123, I was told all the cells then on the market were old stock but that the company planned to resume production.

patmurris
patmurris's picture
Offline
Last seen: 13 hours 9 min ago
Joined: 12/22/2014 - 15:54
Posts: 1350
Location: Nice, France

Impressive current indeed, although at a low voltage.

If those cells are as old as their datasheet…

vapcell Dennis
vapcell Dennis's picture
Offline
Last seen: 11 hours 20 sec ago
Joined: 09/14/2018 - 04:31
Posts: 156
Location: China
Barkuti wrote:

Sorry but there’s something wrong with this test: the reviewed cells were bad, for sure.


You already reviewed this cell in the past with the old station, dear Henrik: A123 26650 2500mAh (Green)


Let’s take a comparative look at the discharge graphs:


 


From this review:



 


From the old review in the old, non 4 terminal (?) holder station:



 


The difference is appalling! 


 


Mooch also reviewed this cell 2¾ years ago: A123 ANR26650M1-B 2400mAh 3.3V 26650 Bench Test Results…an extraordinary battery, with issues


His main discharge graph:


 



 


Regards and cheers Smile 

Yeah ,It is old a123 cell, HKJ,could you mark old cell,or The title says old M1B

Battery curves are compared with M1B,

https://lygte-info.dk/review/batteries2012/A123%2026650%202500mAh%20(Green)%20UK.html

This battery is very good Thumbs Up