Test/review of Energizer D 2500mAh NH50 (Silver)

HKJ · 2018-04-08T15:53:20.000Z

Energizer D 2500mAh NH50 (Silver)

Official specifications:

Classification: Rechargeable
Chemical System: Nickel-Metal Hydride (NiMH)
Designation: ANSI-1.2H4
Nominal Voltage: 1.2 Volts
Rated Capacity: 2500 mAh* at 21°C (70°F) 500mA discharge to 1V
Typical Weight: 73.0 grams (2.6 oz.)
Typical Volume: 57.0 cubic centimeters (3.5 cubic inch)
Terminals: Flat Contact
Jacket: Plastic

Maximum temperature raise at different discharge currents: 1A:+0,3°C, 2A:+0,6°C, 3A:+1,3°C, 5A:+2,6°C, 7A:+3,6°C, 10A:+4,7°C, 15A:+5,3°C
This is low capacity D cells from one of the big brands and as can be seen on the photos the capacity is with a fairly discrete font.

The two cells matches fairly well and can deliver the rated capacity. At high current they are considerable better than AA cells.

Conclusion

These batteries do not have more capacity than AA batteries, but are better at high current. They feel very lightweight and my guess is that they contain a smaller cell inside.

Notes and links

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

Terry_Oregon · 2018-04-08T16:51:41.000Z

Judging by the 2,600 reviews on Amazon, they are certainly popular. About a third of the cost of two Powerex D cells, but also 1/4 the capacity.

StandardBattery · 2018-04-08T19:56:54.000Z

Yes too bad they could not have made them at least 5000mAh. Still in some applications better than messing with an AA in an adapter.

patmurris · 2018-04-08T20:22:02.000Z

Thanks for the review.
It seems odd to see such a low capacity big cell.
As you suggest it, there may well be a AA cell inside.

HKJ · 2018-04-08T20:38:20.000Z

patmurris:

As you suggest it, there may well be a AA cell inside.

Not AA, but a Sub-c cell.

patmurris · 2018-04-08T21:29:57.000Z

Did you open it?

Last time i had to deal with sub-Cs they where nowhere close to 2500mAh… but they where cheap ones.

PS: please cut this cell in half - and let’s see what’s inside! :smiling_imp:

HKJ · 2018-04-08T21:38:07.000Z

patmurris:

Did you open it?

Not yet.

patmurris:

Last time i had to deal with sub-Cs they where nowhere close to 2500mAh… but they where cheap ones.

PS: please cut this cell in half - and let’s see what’s inside! :smiling_imp:

I will probably open it when the weather get better, I prefer to open batteries outside.

Venom · 2018-04-08T23:37:17.000Z

Thanks for the review HKJ!

In this thread there a cutaway of the D Energizer Difference between Opus BT-C3400 & BT-C3100 v2.1? - Chargers - BudgetLightForum.com

StandardBattery · 2018-04-09T00:05:53.000Z

Venom:

Thanks for the review HKJ!

In this thread there a cutaway of the D Energizer Difference between Opus BT-C3400 & BT-C3100 v2.1? - Chargers - BudgetLightForum.com

Right here to be exact.

Barkuti · 2018-04-09T02:15:55.000Z

Totally looks like a sub-C cell spot-welded inside.

The next ones are somewhat pricey (and ;-) heavy), but more like the real deal:

GP 1.2V 9000mAh Rechargeable Ni-MH D-Size Batteries (2-Pack) @ FastTech
Soshine D Size 1.2V 11000mAh Rechargeable Ni-MH Battery (2-Pack) @ FastTech

Related test: http://www.torchythebatteryboy.com/p/nimh-d-size-batteries.html

Cheers ^:)

Enderman · 2018-04-09T02:49:40.000Z

Those ratings are definitely BS.
Even high end sub-C cells for RC are 5000-6000mAh max.

moderator007 · 2018-04-09T03:51:47.000Z

A few years back when I built a lot of maglites with D cells, about the best D Nimh cell was the Powerex 11000mah from Maha Energy. Not cheap at all.
I guess you have to pay for the extra capacity. Too expensive for me to buy 4 to run in a mag. If your up for it HKJ it be nice see these tested. From what I have read they generally give more than 11000mah at low currents. Can’t find any hard data to back that up though.

Maha Energy

Powerex D 11000mAh (2-Pack)

Maha Energy is the maker of Powerex batteries, NiMH Rechargeable Batteries, aa battery charger, aaa battery charger, nimh battery charger and charging solutions. Powerex batteries offer the highest performance available today. Powerex chargers use...

Price: USD 35.95

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Thanks for all your testing HKJ, valuable info.