Rechargeable alkaline batteries, anybody used them?


Mannesty

Link Posted 18/08/2011 - 11:24
I saw some rechargeable alkaline batteries in a supermarket yesterday and wondered if anyone here has used them.

They seemed expensive to me, but I expect they are cheaper online.

4 X AA's + 2 x AAA's and mains charger were just over 30.00

Their main advantage would be that they deliver 1.5v instead of the 1.2v of NiMh's. They are also supplied ready for use and will apparantly hold their charge for up to 7 years.

These are the ones I came across.

EDIT: It seems they are not meant for use in high drain situations, like cameras. They are more suited to low use/low drain items like remotes & torches etc.
Peter E Smith

My flickr Photostream
Last Edited by Mannesty on 18/08/2011 - 11:45

Algernon

Link Posted 18/08/2011 - 11:35
I assume that they are Ray-O-Vacs?

Good idea being 1.5v but of very limited use.

If you completely exhaust them you might if your lucky get
one more charge

If you have anything that uses say 10-20% of the power
between charges they will charge up a few hundred times.

They were the same price as Ni-Cads in the UK and they
needed their own charger although I managed with a Tandy
pulse charger.

They were sold off cheap in the end.

I wouldn't touch normal Ray-O-Vac alkalines with a
barge pole they have damaged quite a lot of my equipment
with leakage

EDIT: Just noticed the link. Branded Pure. Ray-O-Vacs
were the original inventors so I don't know if these
are the same?
Half Man... Half Pentax ... Half Cucumber

Pentax K-1 + K-5 and some other stuff

Algi
Last Edited by Algernon on 18/08/2011 - 11:39

Mannesty

Link Posted 18/08/2011 - 11:50
Algernon wrote:
If you completely exhaust them you might if your lucky get one more charge

It seems that the 1.5v claim is a bit erroneous.

Quote from Wikipedia:

Quote:
Though rechargeable alkaline batteries are relatively cheap and contain a high charge-capacity, their rechargeable capacity will vary by how much they are discharged:

If they are discharged by less than 25%, they can be recharged for hundreds of cycles to about 1.42V.

If they are discharged by less than 50%, they can be almost-fully recharged for a few dozen cycles, to about 1.32V.

After a "Deep Discharge", they can be brought to their original high-capacity charge only after a few charge-discharge cycles.

Not much use for DSLRs & flashes then.
Peter E Smith

My flickr Photostream

prsjnb

Link Posted 18/08/2011 - 12:29
Mannesty wrote:
I saw some rechargeable alkaline batteries in a supermarket yesterday and wondered if anyone here has used them.

I looked into the supposed benefits of using these very same batteries but, after a bit of research on the web, came to the conclusion that, for me giving the number of rechargeable MN1500/AAs I use, the switch would not be economically viable.

I also wondered about the 'real world' benefits of 1.5 vs 1.2V. What I read, however, seemed to suggest that with most modern battery powered electronic equipment the ability to maintain a high current output is of far more significance.

In the end, and having wasted a not inconsiderable sum on cheap and not so cheap batteries in the past, I decided to standardise on the use of Sanyo Eneloops. An improved version of the original type has been introduced recently, as has an higher current drain variant link.

The other factor that is often overlooked is the quality of the charger, which is often the determining factor when considering the reliability and lifespan of the rechargeables used. After, conducting the usual OCD-style research, I went ahead an purchased a model from Powerex/Maha link, although I know from experience at work that the top models from Ansmann are also very good e.g. link, but difficult to find discounted to any significant extent (I was fortunate in that the Powerex/Maha was on 'special' at Maplins when I bought it).

To summarise, I have found the Eneloop/Powerex combination to be of high quality, reliable and suitable for use with all of the electronic equipment, including photographic flash, powered by MN1500/AA batteries in my possession. I cannot comment, however, on their suitability for use in DSLRs such as the KX or KR.

Hope you find at least some of this informative and/or helpful, Peter.

Best wishes,

Jon

Mannesty

Link Posted 18/08/2011 - 12:39
prsjnb wrote:

Hope you find at least some of this informative and/or helpful, Peter

In the short time I have researched these batteries this morning, I've come to the same conclusion, that it's not worth switching from my Eneloops.

"If it ain't broke, don't fix it" rings true here.

These recharegable alkalines aren't apparantly meant for high current drain and/or frequent use applications anyway.

I've used my Annsman Energy 8 charger for many years with no issues so far.
Peter E Smith

My flickr Photostream

Algernon

Link Posted 18/08/2011 - 12:41
prsjnb wrote:
I also wondered about the 'real world' benefits of 1.5 vs 1.2V

If you want say 6v using 4 cells instead of 5 is a MASSIVE real world advantage

"After a "Deep Discharge", they can be brought to their original high-capacity charge only after a few charge-discharge cycles."

This sounds wrong to me? It was the reason they originally
failed.... they couldn't be brought back.
Half Man... Half Pentax ... Half Cucumber

Pentax K-1 + K-5 and some other stuff

Algi

sam-joseph

Link Posted 18/08/2011 - 13:09
+1 for the Maha Powerex AA's. Very good batteries.
Regards
Sam-Joseph
Pentax K7, Sigma 17-70 f2.8-4.5, Sigma 70-200 f2.8 APO EX, Sigma 70-300 APO, Sigma 1.4x TC, Vivitar 2x TC. Takumar 135mm f2.5, SMC Pentax A 50mm 1:1.7, SMC Pentax -M 1:4 200mm, Pentax X70

pentaxian450

Link Posted 18/08/2011 - 16:05
I tried them. They're usable in flashes, but not too hot in cameras. The voltage drops too quickly.
Yves (another one of those crazy Canucks)
Last Edited by pentaxian450 on 18/08/2011 - 16:05

ChrisR

Link Posted 18/08/2011 - 16:18
Its all been said, stick with (Eneloop) or (GP ReCyko).
You wont go far wrong with either.

Take care.

Chris R.
Chris R.

I. El. (Eng). (Rtd).

Anvh

Link Posted 18/08/2011 - 19:43
there are also Nickel-Zinc (NiZn) batteries, those are rechargeable and give 1,7v like lithium does and they are meant for high drain like camera's and flashes.
Not all equipment like them though, i've hear some cheaper and older flashes being damaged by them.

here is a comparison what they do to your flash.
http://www.youtube.com/watch?v=GsLKj_mjnGU

This a bit extreme though XD
http://www.youtube.com/watch?v=UwMy8qdf7Vg&feature=related
Stefan


K10D, K5
DA* 16-50, DA* 50-135, D-FA 100 Macro, DA 40 Ltd, DA 18-55
AF-540FGZ
Last Edited by Anvh on 18/08/2011 - 19:48
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