I have a set of bathroom scales. I opened the battery compartment and the battery is hard connected. It is the same shape as a 9 volt battery but it looks like it is designed for never replacing. I assume that your weight is enough force to supply a charge to the battery.
Anyone know how these actually work?
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Is it just a lithium one? That's what's used in lifetime smoke detectors (10 year life).
It is a lithium battery. I would call a lifetime a little more than
10 years. ---
Yours or the scales'?
The phrase "lifetime guarantee" always makes me smile; "It's guaranteed until it reaches the end of its life" ;-)
In the case of smoke detectors, the sensors have a safe life of around 10 years, so there's no point in having one with a much longer battery life.
I have a stack of 3.5 floppies that have a lifetime guarantee. I wanted to install spinrite a few weeks back. It took me 5 disks before I found a good one. Guess the lifespan of a floppy is about 10 years too.
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