Rechargeable battery time again

lellie

Every time we've wanted them before they've gone pretty much instantly. I could do with some. I think they're 2100s if you look at the picture (of the AAs)

Rave

yezdi wrote:

It certainly matters if it is Ni-Cad or Ni Mh. Ni-Cad batteries have a memory effect.<snip>

No they don't. When NiMH batteries are this cheap there's no reason to buy NiCd of course, but the memory effect in consumer NiCd batteries is a complete myth.

However, it is recommended to use the panasonic batteries because that would give you optimum performance. The performance of a rechargeable battery depends not only on the make and battery capacity but to a large extent also on the charger. The panasonic charger would perform as originally designed with panasonic batteries.

What makes you say this? If it's a decent charger, then it'll sense the voltage drop that occurs when the battery is fully charged and stop. If it's a basic timer charger, then as long as your new batteries are the same capacity or higher than the original ones, you'll get the same run time. In both cases the manufacturer of the battery is completely irrelevant.

bad-head-day

I've just had this charger delivered from 7dayshop:



It is a really good quality item. It charges batteries individually, you can also mix & match any combination of AA & AAA at the same time. It has an onboard fan to cool the batteries as they charge (and the unit, I would presume). It also has a few fittings for the power adaptor so it is perfect for taking on holiday. It also has a 12V car lighter adaptor.

I bought one for my dad for fathers day (plus 2700mAh batteries a spare battery case for 'empty' ones & a 99p battery indicator) then changed the quantities of everything to 2


http://www.7dayshop.com/catalog/product_info.php?manufacturers_id=&products_id=101059

p.s. I forgot to say it costs £14.99, I also used priority shipping but it certainly isn't next day delivery - I still waited 5 days. Unless you're in a real hurry I wouldn't really recommend paying for the premium shipping.

espresso

Rave wrote:

No they don't. When NiMH batteries are this cheap there's no reason to buy NiCd of course, but the memory effect in consumer NiCd batteries is a complete myth.



What makes you say this? If it's a decent charger, then it'll sense the voltage drop that occurs when the battery is fully charged and stop. If it's a basic timer charger, then as long as your new batteries are the same capacity or higher than the original ones, you'll get the same run time. In both cases the manufacturer of the battery is completely irrelevant.

I totally agree, a good charger will correctly charge any make of battery!

Capacity of the ALDI batteries:

AAA = 750mAh, AA = 2100mAh, PP3 = 200mAh, D = 3500mAh, C = 3500mAh.

:eek:

macgyver

I have uniross 800ma NiCd batteries and charger with them.
I just wanted to know that whether I can use these NiM batteries from Aldi on this uniross charger??
Somebody kindly help.
Thanks

espresso

Is it like the second one down on this page? If not do you have a model number for the charger?

macgyver

Thanks for the reply. I had a good look on the charger and in fact it is not UNIROSS but it is a company name EVEREADY!!!!!
I bought it on the ebay.
The charger doesnt have any model number on it but it is written over it that:
Input: 230v Ac 50Hz
Charge 1,2,3or 4 of NiCd batteries at a time.
Other batteries may damage the charger and cause injury.

Many thanks for your effort

yezdi

Rave wrote:

No they don't. When NiMH batteries are this cheap there's no reason to buy NiCd of course, but the memory effect in consumer NiCd batteries is a complete myth.



What makes you say this? If it's a decent charger, then it'll sense the voltage drop that occurs when the battery is fully charged and stop. If it's a basic timer charger, then as long as your new batteries are the same capacity or higher than the original ones, you'll get the same run time. In both cases the manufacturer of the battery is completely irrelevant.

If you just do a search in google for memory effect in Ni-Cd batteries you should see a million pages explaining this. A couple of examples for your benefit:
Memory effect 1
Memory effect 2
I know that the manufacturers of Ni-Cd batteries would contest the above but from experience I have no doubt that this is true. My Dect phone came with Ni-Cd batteries. In one year, the phone simply did not charge any more. I replaced the Ni-Cds with Ni-Mhs and it is 2 years since I've been using the same Ni-MHs and I havent yet seen any sort of deterioration in the battery performance. I dont care what others say because I have experienced what is the truth about the Ni-Cds.

If you had read some battery test reports you would not have said that it is completely irrelevant. As I said that the difference may not be so obvious to us but to those people who have done battery testing the difference can be easily verified.
Battery test 1

The above link explains the importance of chargers
More info below :
More battery reviews

raymond

yezdi wrote:

If you just do a search in google for memory effect in Ni-Cd batteries you should see a million pages explaining this. A couple of examples for your benefit:

You will also find a couple of million explaining why it doesnt happen

The BIG disadvantage of NiMh is the self discharge rate is very high, so for equipment with low current requirement like radios and clocks NiCd are better.

Also, it is dodgy to charge NiMh in a charger designed for NiCd because the voltage drop when charged on a NiMh is much smaller than NiCd and some chargers do not detect it.

shareef

There were a pack of four AA rechargeables in poundland
when I went in yesterday!