radio eats batteries

May 06, 2008 2 Replies
R

I purchased an armband radio recently, for jogging. Truetech, if that means anything.



I inserted 2 new alkaline AAA batteries, they are now dead after about 90 minutes use. Is that normal? I can still return the radio, if it's presumed defective.



What is the capacity of a AAA battery?



Also, this is the first time I've tried earbud style earphones. The damn things won't stay in my ears! Are there different sizes? I figure it's 'one size fits all'. Maybe my ear canals are too narrow.... (also my ears are too big, but that's another story)



They have the foam pads, which are pretty large, and overflow out the ear canal - they don't squeeze in completely.


-- Rich



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D

Sounds very low, but depends entirely on the device. Does it have any specs? Is this it:?

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|AMFM_Armband_Radio_with_Safety_LED_Light&ref=tgt_adv_XSC10001

If that's the case then the LED light will take some extra juice to run. But it could just be badly designed, wouldn't be the first time for such a product.

For Alkaline, anywhere from about 1200mAh down to under 500mAh depending upon the current drain. So if your device was designed properly, it would be draining say 300-400mA from the batteries to last that long. That is very high for such a device. So either you got some dud cells, the device is faulty, or it's badly designed. Perhaps even a combination of all three.

Looks like it uses a standard 3.5mm jack, in that case you can use any headphones on the market.

Dave.

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V

ut

A

Hi there, One reason could be a leaky decoupling capacitor across the main supply rails. Was the battery incorrectly connected? Components today seem to have less tolerance to abuse due to constraints on size minaturisation and costs.

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