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About recharging Ni-MH AA batteries

 Posted - 10/2/2006 7:48:31 PM  - Show Profile  Edit Message

chapas
User
38 Contributions

Hello. I assume some of you use rechargeable Ni-MH batteries (AA) with your Samsung players. I noticed that my batteries discharge in approx. 4 days, even without me using them. My charger has a switch to charge 2 or 4 batteries at a time. I use it to charge 2 batteries at a time, but can just use one because they discharge too fast.

So my question is: Can I charge only one battery at a time? Can something happen to the charger or battery if I do? I hope someone has experience with this and can help. Thanks!  


 Posted - 10/2/2006 9:52:12 PM  - Show Profile  Edit Message

PJPeter
Site Administrator
2019 Contributions

Hmm, well I have Chateau NiMH AAA Batteries - they're 900 mAh which is great for AAA sized ones. I think it really depends on the charger and how long you used the batties for. Rechargeables like mine last great for about 1 year, then they start to deteriorate and run out fast. Some can only lasted for like 5 hours of play or 2 hours or less of recording before they have to change.

My Raovac charger doesn't have any switches, it just detects where there are batteries and charges them. Usually I have 3 in there and 1 in the player and I sort of cycle through them clockwise to make sure they all get equal use. Trickle charging them is good since it keeps them fresh. If you won't be using them for a week or 2 though then don't leave them plugged in until you need them or it's a waste.

It really depends though. I'd check the manual for your specific charger or one like it. That should tell you what you can do with it, since they are so different. The battery age, mAh rating and brand also matter.  

PJPeter


 Posted - 10/3/2006 8:15:00 AM  - Show Profile  Edit Message

heronheart
User
24 Contributions

The quality of the battery charger can also make a difference to the lifetime of your battery.  Checkout http://www.thomas-distributing.com/nimh_battery_chargers.htm fo more information.  

 Posted - 10/3/2006 10:32:00 AM  - Show Profile  Edit Message

chapas
User
38 Contributions

My batteries worked great for a year too, and now they last less and less each charge.

I have a Minwa charger model MW2098. It must be an old model or just on sale in South America, so the quality is questionable. It doesn't come with a manual, and on the back it says to put 2 or 4 batteries. Damn the third world :(  


 Posted - 10/3/2006 1:52:37 PM  - Show Profile  Edit Message

PJPeter
Site Administrator
2019 Contributions

. Ya it sounds like it may be dangerous to recharge with only one battery in there at a time. Maybe you should get 2 more and have 4 in circulation, and recharge 1 new and 1 old each time and keep a spare on hand. Rechargeables are definitely much much better than regular batteries but they do eventually wear away.

The thing I know about mine is the fewer batteries in there the faster it charges. With just 1 it can charge it in about 1-2 hours, while charging 4 dead ones at the same time can take almost 24 hours. With the 3 in there (2 trickle charging and 1 dead) it usually takes about 3-5 hours for the dead one to reach full charge.  

PJPeter

P.S. Here is my charger: Rayovac PS1

Edited by - PJPeter on 10/3/2006 2:30:12 PM
  

 Posted - 10/3/2006 2:37:00 PM  - Show Profile  Edit Message

chapas
User
38 Contributions

Yeah, I won't try it just in case something blows up :) Thanks for the help and links!  

 Posted - 10/11/2006 1:57:13 PM  - Show Profile  Edit Message

th_mi
User
13 Contributions

A high self discharge of NiMH batteriews is unfortunately normal. There is one rule, if the capacity of the battery is higher the self discharge will be also higher. The self discharge of NiMH batteries is caused by three main reasons:  
the chemical decomposition of the kathode
the natural disaggregation of the anode
Impurities of the anode

Since 4 month there are Sanyo "eneloop" NiMH batteries available. This batteries have a very low discharge. I have 3 packs of this batteries and I'm really impressed. After a few month there is still nearly the max. capacity available. Eneloos are available as AA and AAA.

In Europ eneloops are available in most counties. Check out http://www.eneloop.info  
------------------------------------------------

Notebook BatteryInfo keeps the notebook battery capacity in view
http://www.batteryinfo.de.vu

Edited by - th_mi on 10/11/2006 10:44:09 PM
  

 Posted - 1/8/2007 1:25:10 PM  - Show Profile  Edit Message

PJPeter
Site Administrator
2019 Contributions

Thanks for that post, I looked up the "eneloops" and they look very cool. All I read about them there makes me want to buy them, but unfortunately they aren't available in Canada

So I'm thinking of getting some Enegizer e2 4 AAAs (along with a 4 AA pack as well) on sale for $15 Canadian at WalMart soon. They're 900 mAh, and the AAs are 2500 mAh. My old Chateaus that I mentioned in the other post are also 900 and worked fine for about 6 months or so, but then they started to die...very fast. I got a new pack of them, but they are also rather lousy and right now don't last very long at all even though I've only had them for a few months. Probably they are from the same shipment as the first ones and wore out in the package after so long - this deal is cheaper though (Amazon has some for $5.11 US, but I don't want to worry about shipping and waiting).

I'll use the AAs in the Wii-motes and the AAAs in my YP-55X - and probably give 2 of them to my brother, whom I gave a YP-55V for his birthday a few months back. And they'll all be used in my charger (fixing the picture link from above:


  

PJPeter

Civilizations can be born and die,
in the blink of an eye.

Edited by - PJPeter on 2/6/2009 8:20:41 PM

 Posted - 1/9/2007 1:12:58 PM  - Show Profile  Edit Message

phatty
User
68 Contributions

http://www.thesourcecc.com/estore/Product.aspx?language=en-CA&catalog=Online&category=Ni-MH+Batteries&product=2318234 Are these the eneloops? If so, I think they are available in Canada.  

 Posted - 1/9/2007 2:17:47 PM  - Show Profile  Edit Message

PJPeter
Site Administrator
2019 Contributions

Good find, lol. I checked the website as the person gave it above and it said that it was only available in Europe and there were no plans currently to export it. Thanks - I missed my chance to get them this time though unfortunately...but I already got the Energizers and charged them for use now.

Weird though, the Source website lists them as Ni-MH, but the eneloop website suggests they are something different with a different chemical composition. Edit: They aren't Ni-MH, but they are compatible with most chargers for the Ni-MH batteries. The Source's typo, but still good to see them here. 

PJPeter

Civilizations can be born and die,
in the blink of an eye.

Edited by - PJPeter on 1/9/2007 2:19:25 PM
  

 Posted - 1/9/2007 4:20:24 PM  - Show Profile  Edit Message

heronheart
User
24 Contributions

Rayovac has a new "slow discharge" rechargeable battery http://www.circuitcity.com/ccd/productDetail.do?oid=164214&WT.mc_n=92&WT.mc_t=U&cm_ven=COMPARISON%20SHOPPING&cm_cat=NEXTAG&cm_pla=DATAFEED-%3EPRODUCTS&cm_ite=1%20PRODUCT&cm_keycode=92

Thomas distributing also has some slow discharge rechargeable batteries.
http://www.thomas-distributing.com/new-products.htm  


 Posted - 1/21/2007 11:37:13 AM  - Show Profile  Edit Message

th_mi
User
13 Contributions

I use the Sanyo eneloop rechargeable batteries since month, I guess I bought my first pack of four in July or August 2006 and it is really true, the discharge is really low. I use this eneloops for my digital camera and for my YP-MT6 too, and they are really great, it is perfect to have a rechargeable battery after month of storage.

The eneloop cells are available in the US, for example Amazon.com has is for US citizen, but will not ship to CA. I'm sure there are shops that ship to CA also. I can recommend the eneloops since they are not more expensive than a good branded rechargeable battery (you may find cheaper nonames but no good brands).

The other low discharge batteries I do not have any experience with it so I can not say they are good or bad. The only thing is the eneloops really have a low discharge.  


 Posted - 1/21/2007 11:40:43 AM  - Show Profile  Edit Message

PJPeter
Site Administrator
2019 Contributions

Cool, I'm making this reply the same minute as you made your post : ). It sounds good - what type of charger do you use for yours? How do you find their performance in comparison to alkalines or other rechargeables - I mean, I know they hold their charge well, but how well are they when discharging - does it suddenly go from full to empty in a couple of hours or is gradual?  

PJPeter

Civilizations can be born and die,
in the blink of an eye.


 Posted - 1/21/2007 11:46:14 AM  - Show Profile  Edit Message

th_mi
User
13 Contributions

I use the Sanyo eneloop rechargeable batteries since month, I guess I bought my first pack of four in July or August 2006 and it is really true, the discharge is really low. I use this eneloops for my digital camera and for my YP-MT6 too, and they are really great, it is perfect to have a rechargeable battery after month of storage.

The eneloop cells are available in the US, for example Amazon.com has is for US citizen, but will not ship to CA. I'm sure there are shops that ship to CA also. I can recommend the eneloops since they are not more expensive than a good branded rechargeable battery (you may find cheaper nonames but no good brands).

The other low discharge batteries I do not have any experience with it so I can not say they are good or bad. The only thing is the eneloops really have a low discharge.  


 Posted - 1/21/2007 11:51:41 AM  - Show Profile  Edit Message

th_mi
User
13 Contributions

Upps

I did not see you answered to my posting, I had a white windows so I posted again :(

I use a normal charger for NIMH cells. Every NIMH capable charger should work great.

I have two chargers, one "noname" it is the house brand of a german electronic market and I also have an "Ansmann" charger. This company is a really good brand in Germany, the chargers a good but not really cheap.

Currently I begin to relpce all my non chargable batteries in remote controls and so on with eneloops. At the moment I can not see any differences.


For example I did not use my YP-MT6 for two month or something like that and the battery display shows still the full charge...  


 Posted - 2/1/2007 9:00:29 AM  - Show Profile  Edit Message

PJPeter
Site Administrator
2019 Contributions

Thats good in terms of storage - but do they last as long as the Alkalines when in actual use? Overall these are sounding more and more like the ones I want to get as my next set of batteries

I have an Uncle and Aunt who have electric candles, along with other battery driven electronics, all over their house, and they always use Alkalines because they don't use them every day (Though often) and don't want to have to replace them every couple of weeks because the rechargeables bled off. They used to use rechargeables sometimes, but this put them off of them. So now when I was over at their house they had a 108 battery package sitting there half used and it really made me think how much could be saved in that sort of department...  

PJPeter

Civilizations can be born and die,
in the blink of an eye.
  

Edited by - PJPeter on 2/1/2007 9:02:41 AM
  
 

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