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Old Aug 25, 2004, 7:29 PM   #1
sdh
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Hi all, I have a new Sony W1 that Im looking forward to using while skiing this winter. I understand NiMH batterys don't do so well in cold temps andthat NiCad's fare better in the cold (even though they have lower capacity overall). The manual of my W1 recommends against using NiCad's which seems strange. Do NiCad's & NiMH supply different voltages? If not, why else would it be unadvisable to use NiCads? Are there any other rechargeable options? Im reeeaaally dont want to use throw-away-non-rechargeable-alkalines in a digital camera. (apologies if this question belongs in the Sony forum!)

TIA!

-steve
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Old Aug 25, 2004, 10:44 PM   #2
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Use lithium or lithium-ion batteries for cold weather use. Many cameras can use proprietary lithiums (like CR-V3) or lithium AAs...you should see what options are available for the Sony.

BTW, the easiest way to damage a camera is bring it from a cold environment to a warm one (moisture will condense on electronics)...put the camera into a bag outside and seal it before bringing it inside.
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Old Aug 26, 2004, 8:08 PM   #3
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Thanks Mikefellh. I didnt know that LithIon rechargeables were available in AA size, but Ill have to look for them.
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Old Aug 27, 2004, 12:53 AM   #4
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Not lithium-ions, non-rechargeable lithiums. They are specially designed to operate at 1.5v (rather than the 3v that lithium normally operates).

You should also see what options are available in the Sony forum here...maybe they have a lithium battery that works with Sonys (like the CR-V3 that works with some Olympus cameras).
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Old Aug 27, 2004, 7:21 PM   #5
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Or just buy a Digipower DPS 9000 Lithium external battery

It is portable across most digcams so you only need to buy it once.
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Old Aug 27, 2004, 9:58 PM   #6
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I had forgotten about the Digipower battery...it's a great suggestion especially if this is something you plan to do often!!!
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Old Oct 15, 2004, 7:51 PM   #7
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Here's an idea:

Get or make an external battery pack that will work properly with your camera, and has 5-8 feet of wire between the battery holder and the camera plug. Put your regular rechargable NiMH's in it, and place the battery holder inside your coat, next to your body, where it will stay nice and warm.

Run the wire out your coat to the camera through an appropriate orface. If you are carrying the camera on a neck strap, out the collar and down along the strap should work well.

Since you can use your regular rechargable batteries, which presumably you already have, this approach could be quite inexpensive.

If you make it yourself, just be sure you know what you are doing and get it right before you hook it to your camera. I am not responsible if you screw up and fry your rig. Some settling may occur during shipment. Your mileage may vary. Void where prohibited.

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Old Nov 30, 2004, 1:19 PM   #8
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Don't use cold batt's , they are chemical and all things chemical

need warmth to operate . Cold wise , Nicad is same as NimH .

Your batt will not get as much energy , before you must

recharge ( you lose capacity ) if you use it cold ( below 70F

it will start to show you bad results and at 35F it will lose

enough to be serious . Maybe35% of it's value , i guess .





It takes > 160% to recharge a batt' . If it's old , or cold

you need MUCH more recharge energy .



BTW AAA batt's are too expensive , they cost the

same and have 1/4 the energy of AA . Big penalty .

I used to go thru 20 sets of AAA's in my Hewlett packard

48GX , now i use 2 sets a year by changing to AA's.

Nicad is same as NimH , same volatage , same discharge

characteristics ( NimH is a bit lower Z ) . Very flat discharge ,

difficult to use volt to see the end of life . At 1.25 vdc , you maybe

are out of gas .

I am amased at how many things over tax their batt's . AA's

can't do .5 amps !! You need more than that from the FRS radios

AND THEY USE AAA's !!! I lucked out , my rare FRS are AA's .

This is why you don't get makers claimed life from your batt's


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