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gtdude (Mechanical) (OP)
12 Dec 08 10:32
I am a development engineer for a company called Powertach. Powertach is an auto accessory that requires a wireless transmitter to ride on an automotive driveshaft. The transmitter is powered by three AA alkaline batteries. When I went to test the product yesterday morning I found that it did not transmit early in the morning. Once the car warmed up it began working and I read online that these batteries will only work at room temperature.

I wonder if there is a type of AA cell that will work in cold weather conditions so that I don't have to wait for the car to warm up. Thanks in advance for your help.

Andrew
www.powertachhp.com
ScottyUK (Electrical)
12 Dec 08 11:07
Lithium thionyl chloride has about the widest temperature range of the common battery chemistries and is available in the sizes you are considering. Performance of any chemical battery will be poorer at lower temperatures.
 
  

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If we learn from our mistakes I'm getting a great education!
 

gtdude (Mechanical) (OP)
12 Dec 08 17:14
With lithium ion batteries such as this one (http://www.energizer.com/products/hightech-batteries/lithium/Pages/lithium-batteries.aspx) is there any chance that they will damage my circuitry. Will they provide a stronger current than the standard alkaline batteries or are they virtually the same except for longevity.

I don't want to power up my transmitter with these new batteries only to find that they will burn up my circuit.

Thanks for the help.
IRstuff (Aerospace)
12 Dec 08 17:49
Say what?  

How is a battery of the correct voltage going "burn up" your circuitry?  Is there some violation of Ohm's Law here?

Did you read the datasheet,  http://data.energizer.com/PDFs/l91.pdf, at all?  

These batteries can only discharge about 2 amps, which is 1/5 of what a fresh alkaline battery can put out.

TTFN

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gtdude (Mechanical) (OP)
12 Dec 08 17:51
I'm not much of an electronics guy and my boss told me to make sure.

Thanks for the response.

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