Test/Review of Fujitsu AAA HR-4UTC 750mAh (White)

Fujitsu AAA HR-4UTC 750mAh (White)

Official specifications:

  • Nominal voltage: 1.2V
  • Typical capacity: 800mAh
  • Minimum capacity: 750mAh
  • Low self discharge (LSD)
  • Retains 85% charge after one year, 70% after 5 years.
  • Rechargeable up to 2100 times.

Maximum temperature raise at different discharge currents: 1A:+1,9°C, 2A:+4,5°C, 3A:+6,7°C, 5A:+10,5°
These cells are long life NiMH from the FDK factory in Japan.

There is very good tracking between the two cells. They can handle 5A current, but as usual it is better to use a lower current.


These cell has very good performance and are supposed to last for many years.

Notes and links

The batteries was supplied by FDK German for a review.

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

Thanks as always for the review and figures.
It’s probably worth noting for others that Fujitsu is actually the manufacturer of Eneloop cells (Panasonic/Sanyo brand).

Source: Eneloop - Wikipedia

This also explains the identical stats on the packaging.
So if you manage to find retail Fujitsu cheaper than 4th Gen Panas then go for it!

On a separate note, is there any chance of a review for new 10440’s?
Especially bearing in mind the almost total lack of non-*Fire 10440 batteries available in ICR/Protected.

  • OLight I7R provided battery (supposedly available separately but unable to find).

I have IMR 10440 (Efest v1), which are closer to standard AAA-length due to lack of protection circuit, and use these for almost everything that accepts the voltage. However it would be nice to have a (non-*Fire) ICR choice where the protection is preferred to prevent over-discharge. I purchased a LL M3R recently and it is a great little zoomie light; the included 10440 certainly seems safe and reliable.

Perhaps Ledlenser, LEDCO (UK distributer), or one of the stockists is willing to supply a battery for your tests, as it will undoubtedly help them with sales through association with the forums and your testing endorsement.

Failing that - if you’re willing - I’d be happy to send you my recently purchased one (still sealed in packaging); if you would be able to return it after testing?…

All the best,

I will ask them, the price for a cell is a bit high: £25 for two cells with shipping.

That is not really a good idea, I need two cells for a test and some of my high current test can be a bit hard on the cell.