Question about Sony AA Nimh 2500 Mah Rechargeable Battery

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Initial charging time

I just bought 4 Sony AA Nimh 2500 Mah Rechargeable Batteries. How long should the initial charging be? and once used, how long should I charge it? thank you

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Hi there
the first charge should be around 12 hours, this then teaches the battery its max load.
ignore the charger if tells you its charged after a couple of hours.
after the first charge use as normal.

hope this helps

beergut707

Posted on Oct 09, 2008

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I have got the batteries on chraging since 6 hours. they are still charging. so i guess that it takes 7 hours or more to charge the batteries

Posted on May 14, 2009

Thanks beergut707.
actually, i found the charger's manual last night and it stated there that the charging hour is 7. but it depends on the Mah of the battery.
But, i do appreciate your reply. i'm not aware of ignoring the light inidcator. I usually pull the plug when it not lit. so maybe that's why my old batteries gets empty easily.
have a nice day!

Posted on Oct 10, 2008

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Posted on Jan 02, 2017

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How long should I charge my 900mah li-ion batteries for the first time? How long should be after first time?


You should be OK to charge the battery for 10 hours at a constant current of about 90mA. I assume this battery is a 3.7v type, with a full charge voltage of about 4.2v (it would be useful to monitor this with a multimeter).
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Jun 08, 2014 | Sony AA Nimh 2500 Mah Rechargeable Battery

1 Answer

How long should i charge my 2500mah batteries for the firs time??? How long should be for 1350mah??? How long should be after first time???


The first charge is - as you suspect - longer than the normal charge in order to "wake up" a battery that may have been on the shelf for a considerable time since manufacture. Typically 30 hours for the 2500mah batteries and 16 hours for the 1350mah.

I assume that your charger charges at a rate of 140 to 160 mA. This info is usually printed on the charger itself. (Quick chargers is a different story and the chargers are usually intelligent and can regulate the charging electronically.)

If your charger charges at a rate different to the typical 140/160mA, then increase or decrease the time for charging accordingly, i.e. reduce the charge time if the charge rate is higher. A good and safe test would be to check the batteries from time to time for heating. Stop the charging as soon as you find that the batteries are heating to anything warmer than a mild temperature rise.

Jan 03, 2011 | Sony AA Nimh 2500 Mah Rechargeable Battery

1 Answer

I have sony AA 4 batteries. out of them 2 are working in the camera but 2 r not working. what could be the problem..


It may be a bad batch of batteries. However, I would take them out, put them in the charger, but try shuffling positions in your charger in case one of the charger slots is not working.

Dec 18, 2010 | Sony AA Nimh 2500 Mah Rechargeable Battery

1 Answer

Will this charge 2450 mah battery?


Yes, this will charge any AA-AAA Batteries. Typical charge will be about 14 to 18 hours

Oct 01, 2010 | Duracell AAA NiMH Battery Charger with 4...

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I charged my Duracell 2400 mAh batteries for 15 minutes, and I was able to shoot only 10 pictures with them in my digital camera before they went dead. What is the problem here? I repeated the process with...


your lucky then,,, they take 16 hourse to fully charge unless you rapid charge them? a nasty thing to do to a new battery? all ways slow charge them first,,
never fast charge any battery only charge at whats called "the C10 rate!" they live much longer that way,
in other words slow charge when first charge,,,faster after that! ok,, did you not know you must "form the cells first" before you use them?

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I bought KODAK NiMH 2400 mAh and it isn't rechargeable when I recharge it it jus work for few minutes.


NiMH tends to have a "memory". What this means is that the batteries will get used to being only charged and discharged a certain amount. What could be happening is that the battery THINKS it is charged when it is not... or.. it THINKS it is discharged when it is not. You can try to recondition them:
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  3. put them in your device and drain them
  4. let them sit, drain them again
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Do this a few times. If you don't notice an improvement, you may want to consider getting a new set of batteries - I would recommend lithium rechargeables.

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Rechargeable time


2-4 hrs and yes the aa battery can be charge on this device.

Dec 02, 2008 | Duracell AAA NiMH Battery Charger with 4...

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