Overview: All Eneloop batteries 2005-2024

Hi Brad,

I suppose they are authentic, but it cant be seen from the pictures.
The pictures show the 1st/2nd gen with venting holes.
sure tell use when you receive them!

I got them 6 weeks ago and to my non-expert eye they look fine.

They don’t have vent holes and are labeled HR-3UTGB and embossed/stamped, 12-08 E1.

At $10.50 per set, it seems pretty sweet, but they have no deals on the AAAs.

I wonder how hot the regular eneloops can get during high discharge. I thought these were meant for toys? Maybe they couldn’t market them very well.

Were they still making gen 1 enerloops in 2010? My HR-3UTG have a code of 10-03YH

in my country, all are still gen 1. not to mention gen 3, i’m trying to find XX gen 2, zero results. everything is in accordance of whatever gen that they are distributing in singapore.

You can check my test/review of them, I has a temperature probe on them and discharge with up to 10A. I have also tested the XX, but have not published the result yet.

Thanks, HKJ! So they could potentially get hotter still in housing with no ventilation.

Much hotter, when testing I only have one cell with air around most of it.

I am using my clamp to hold the battery:

And I do not put NiMH into a LiPo sack.

The battery is probably slightly hotter than I measure, because I stop measuring when I stop discharging, but the maximum temperature will first reach the thermo sensor a bit later.

Nice clamp setup! Is such extreme heat harmful to the cells or even dangerous?

It does make me wonder if this PLUS technology will be integrated into future Panasonic eneloop generations.

I am interested into knowing the performance of the XX compared to the white regular eneloop.

Interesting to see how it performs under high loads (more than 3 amps)

Thanks for sharing, mate!

The eneloop is rated for 50°C ambient, but it does not say what the maximum battery temperature is.

If the temperature gets to high it will damage the batteries, but if damage happens at 60°C, 100°C or even higher I cannot say.

Good to know, I thought once they started on a new generation they stopped making the old.

If you want to see some eneloop torture (please don`t watch fishinfool)

take a look at this link.
Look at the video half way down, and you can see the difference between the classic eneloop and the Plus.

Thanks, ChibiM. These pictures are very telling!

Similar to my overheated Uniross with bubbling wrapper:

So question then, I can get either 3rd generation or 4th eneloop’s what is more desirable?


4th gen, 300 more cycles (2100), same minimum capacity 1900 mAh (AA)/750 mAh (AAA).

Press release:

I didn’t realize until just now, reading this thread, that Panasonic acquired Sanyo, and are phasing them out. So my “Sanyo” eneloops are antiques and will be collector’s items in a hundred million years.

Hi all,

I am looking to buy some Eneloop cells for my Quark QP2A and Nitecore EA4w flashlights I have on the way and was wondering if it is worth spending the extra money to buy the higher capacity XX 2500mAh Eneloops over the standard 1500 cycle/2000mAh ones ?

Any advice ?

They have less life to them is my understanding.

See if you can find Sanyo Harmolattice for a cheap price, they are the same as Pro/XX but don’t come pre-charged. They are sold in many countries across Asia but find their way in to other countries as well (some local eBay sellers sell them here in Australia). You can save a bit of money off the Pro/XX price for the same cells with a different wrapper.

Personally I would only buy them unless I needed the extra run time, if you are going to use it for more than a hour in 1 go on high for example then they might be worth it but if you dont then you can recharge them more often and get more power from the regular eneloops over their life time.

Either will be fine, if you don’t need the long run times then it just comes down to personal preference.