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Old 03-25-2008, 05:26 PM   #1
shadow
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Default Varta 15min Charge & Go Charger

I recently bought the Varta 15min Charge and Go Charger, mainly because of the price! It was half price! This was due to the fact that this charger has been discontinued and a newer model has super-seeded it.

My question is how long does this charger take to charge regular (aka not Varta brand) NiMH batteries? I could not find the manual for this charger on Varta's website and I keep on reading contradicting statements from people on the net. Some say that it will charge regular NiMH batteries in around one hour while other say it will take 12-16 hours.

The only reason I got this charger was because using my Uniross Globe Trotter charger is painful! It is a very safe charger and it never seems to fully charge my NiMH AA batteries. Sometimes I have to restart the charging process after about 5-10mins because the charger has switched off because of some safety mechanism. This happens especially with Energizer brand NiMH AA's! Not to mention is charges batteries in at least 8 hours. Which really is not fast or slow for a charger.

I do not want to rip open the packet and find out how long it takes to charge my batteries because if it is going to take 12-16 hours. I am going to taking it back to the shop. It it is quick, upto around three hours. I will probably keep it.

If you have any suggestions for affordable, good battery chargers. Just shoot!

Old Varta charger looks like this (the one I have):

New Varta charger looks like this (the super-seeded model):
Attached Images
File Type: jpg 57255-101-421.jpg (48.3 KB, 33 views)
File Type: jpg 57279 412 441.jpg (35.2 KB, 32 views)
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Old 03-25-2008, 05:53 PM   #2
willawake
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Default Re: Varta 15min Charge & Go Charger

15mins lol!

how many milliamps or rather amps is it providing?
personally i dont recommend charging regularly over 700ma. like some chargers are providing 1500ma which is too much. if the batteries are too hot to hold after charging then its too much.

but anyway some people like to buy new batteries regularly

after trashing many batteries in the office cheap chargers i use all the time
http://www.techmati.com/reviews/rs900/index.htm
on no more than 700.

another good brand to look at is maha http://www.nznature.co.nz/mshop/spi/1001/1_SOL_1756
but their slow mode like 300ma is kinda slow

i was wondering why my dads ancient fameart brand batteries were still working. charger was an olympus one running at 280ma lol.

but the answer to your question is how much ma is the charger providing. how much mah is the batteries you wanna charge
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Last edited by willawake; 03-25-2008 at 05:56 PM..
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Old 03-25-2008, 06:09 PM   #3
gonzo0815
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Default Re: Varta 15min Charge & Go Charger

The 15min charge is only available with Varta Charge and Go cells, as they have build in pressure sensor to monitor the charging process.

As long as the -dV circuit is working with enough sensitivity, there is no problem in using high charging currents in the range of 1C.

As far as the manual says, it would charge normal cells in 15h (http://static.varta-consumer.de/uplo...ger__26_go.pdf)
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Old 03-25-2008, 06:33 PM   #4
willawake
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Default Re: Varta 15min Charge & Go Charger

wierd. i did not know about this technology. seems to charge normal nimh quite slow though.
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Old 03-25-2008, 06:39 PM   #5
kikkoman
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Default Re: Varta 15min Charge & Go Charger

+1 on the LaCrosse. it's worth its price tag.
Maha chargers are fine, too, if not even better.

AFAIK the Varta charges these cells at 7500mA. I'm pretty sure that this works safely - otherwise they couldn't sell it - but a bit skeptical if the cells can take as many cycles as normal ones can. Guess who benefits if they don't?

One site I found stated that this charger might have only one channel. If that's true, it's worthless junk. Even if you use the cells in pairs.

Quote:
Originally Posted by willawake
seems to charge normal nimh quite slow though.
TOO slow for practical and technical reasons.

good site: http://www.batteryuniversity.com

Last edited by kikkoman; 03-25-2008 at 06:42 PM..
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Old 03-25-2008, 07:08 PM   #6
gonzo0815
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Default Re: Varta 15min Charge & Go Charger

I think the WizardOne MH-C9000
(http://www.betterlifegoods.com/Produ...e=BLG-CAT21446) would be a great unit, but sure it is all but cheap.

Personally i have a simple Cellcon C100 Multi, nothing facny from todays standard but it does the job quite well.
Have paid about 50 for several years.
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Old 03-25-2008, 09:47 PM   #7
kc8adu
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Default Re: Varta 15min Charge & Go Charger

the varta's are the same as the rayovac here.
chinamart clearanced the cells 4/$1
i wiped them out.
they work fine in my c9000.
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Old 03-25-2008, 10:06 PM   #8
shadow
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Default Re: Varta 15min Charge & Go Charger

Looks like I will return this charger. 15 hours to charge normal batteries is just a joke. It's waaayyyy too slow. And then they pump their own batteries with 7.5A and have an active cooling solution! big difference!

I like my current Uniross Globe Trotter Pocket. It is an independent cell charger with lots of protection for the battery that is being charged and it charges at 500mA. However it is just picky with my batteries. It will stop the charge way too soon. The protection circuits on it are a little too conservative.

Here is a picture of it anyway:
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File Type: jpg RC104168.jpg (18.0 KB, 23 views)
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Old 03-26-2008, 05:59 AM   #9
gonzo0815
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Default Re: Varta 15min Charge & Go Charger

May be your cells are not from high quality, cheap NiMh cells will develop high resistance very early in their life.
Some chargers won`t do such cells as they diagnose them as defect.
I would suggest to use Sanyo or Powerex cells, which both where always from the best quality one can think of.
Especially those new PowerEx Imedion cells are looking quite well.
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