Test/review of BPI AA 2400mAh (White-orange)

Batteries and Chargers Rechargeable Batteries
1

BPI AA 2400mAh (White-orange)







Official specifications:

  • Battery Capacity (Mfg Rated): 2400 mAh

  • Battery Chemistry: Ni-MH

  • Battery Feature: Rechargeable

  • Battery Form Factor: AA

  • Battery Rated Voltage: 1.2 V

  • Capacity/output: 2400mAh / 0.2C

  • Standard charge speed: 210mA * 16 hours

  • Quick charge speed: 1050mA * 135 minutes

  • Internal resistance: 40mOhm

  • Designed recharge cycles: 1000

  • Self-discharge rate: 85% after 6 months, 80% after 12 months (both at 20’C)




Maximum temperature raise at different discharge currents: 1A:+1,9°C, 2A:+4,5°C, 3A:+7,1°C, 5A:+14,1°C, 7A:+20,5°C, 10A:+25,2°C

Fasttech calls NiMH these batteries Enelong.











The discharge curves looks fine for NiMH, there is a small difference between the cells.















Conclusion

The batteries looks fine.


Notes and links

How is the test done and how to read the charts
Compare to other AA/AAA batteries: Alkaline/NiMH/Lithium
2

Can we say that they are equivalent to eneloop pro ?

3

No, use my comparator and select BPI and eneloop Pro, the curves do not overlap.

http://lygte-info.dk/review/batteries2012/CommonAAcomparator.php

4

Close enough to me, given the huge price difference :slight_smile:
Thank you very much for all those amazing battery testing, I really rely on these to choose my stuff !

5

Remember my test is on new batteries, I do not test how well they last.

6

Sure, I have a dozen of these so I’ll see how they hold their capacity

7

It would be great to know how well they agree. I have some tenergy’s that tested out well when new but after a couple of years wouldn’t hold a charge for more than a couple of days.

8

Which Tenergy’s specifically degraded so fast? The [Blues] are cheap but don’t seem to hold up well (been there, won’t do that again).
I’ve got some [Centura], AAA, AA and C. Once in awhile they come up for a very good price. So far, those are doing OK, but only ~1 year of use. The C’s are in constant use, cycled about every 2 weeks.

9

Mine are the AA Centura rated at 2000 mAh. I bought 10 in 2014 and they originally tested out at more up to 2252mAh (Opus 3100). When I tested them several months ago 6 wouldn’t hold a charge for a week with the worse dropping to 270 mAh. The other bad ones dropped to around 1000 Mah. The 4 better ones dropped to around 1800 mAh after a week. Not great by any means but better than the other 6.

I lost my original notes in a disk failure but my memory was that when new the tenergy’s didn’t self-discharge much more than enloops did.

10

Interesting, thanks. Like many here I often buy things to check them out for myself. That just doesn’t work too well for long term performance/reliability with batteries.
I’ll keep an eye on the Centuras.