(Charged to 2700mAH) AA Sanyo Eneloop XX Batteries!!

I recently just charged four of my Sanyo Eneloop XX ‘AA’ sized batteries in my Maha C9000 Charger@1000mA and three cells showed over 2500mAh capacity! :open_mouth: They’re rated at 2500mAH btw. Couldn’t believe this when I saw it but had to share it with you guys. I used the batteries to power mobile devices before I put them to charging.

See for yourself! These pic only refers to the cell that showed the highest capacity.


Hi mate, that shows how much was put in to the battery from the charger and some would be converted to heat.

For the capacity of the battery you need to do a discharge.

Try a 500mAh or 1000mAh discharge.

Yup, I’ve noticed my NiMH cells do get quite hot during a charge, and I don’t think the charger is taking the heat into account.
A discharge would give you a more accurate reading. (Sorry to burst your bubble.) :smiley:

Oh that’s very true indeed….sorry folks forgot to take that into account!

Ignore the capacity readings when charging NiMh batts.

The only way to know their real capacity is doing discharge tests.

When chargin NiMh the charger feeds a lot more mAh to the battery than it´s capacity.

Ie. 2500mAh batts will be feeded about 2700 2800mA
Ie. 2100mAh batts will be feed about 2400mA

etc…

diyau, did you test their true capacity by discharging them in C9000 or not?
Im curious to know ;)!

Same with my old Lions, they charge almost fully to 2200mAh but on discharge will do only around 1400mAh.
You need the discharge capacity at the Amps you will use. Or do 0.1C to a safe minimum and see the capacity of the battery.

Yes I did. I did them about 3 months ago when I first got them and they came in about 2500mAH.

I’ve got some new Panasonic 2450mAh LSD cells (HHR-3XXE) and I am quite impressed with them. They seem to hold much more energy than their rating. This is the test result from a BC1000 charger (note this is the discharged energy, not how much is needed to charge them):

That is impressive, Chippy_boy!
Have you checked them how they perform in high drain devices such as running flashlight on high to see how long they hold voltage before it drops?

I haven’t tested them scientifically. I use them for a flashgun for my camera, so it will be interesting to see if I get more flashes out of them compared to Eneloops. I’ll report back when I have some data.

Great, looking forward :D!

Charge values are worthless. Check out these discharge values:

Chippy_boy posted DIScharge results :slight_smile:

Thanks - yes, I did :slight_smile: In “TEST” mode the charger doesn’t display any charge readings until the batteries have been fully charged and then fully discharged, and then it shows the full (discharged) capacity.

By way of comparison, the “Technoline” 2700mAh batteries that came with the charger only managed about 2500mAh on average. The Panasonics are way better, and only supposed to be 2450 capacity!

When I got my MH-C9000 charger it came with 4 of the cells on the left. They claimed 2700 mAh and they are.

The 3 on the right are 10 years old and have gone thru many cycles in a 15 minute fast charger.
One of those is still pretty good.