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I have a battery-less flashlight, with a crank, for emergency purposes. Never really needed it.
Or, I thought it was battery-less. A couple of weeks ago, I managed to open that lid hiding a LIR2450 cell that was leaking all over. (I wasn't aware that Li-Ion cells would leak in a way very similar to dry cells.)
I have been unable to find LIR2450 cells in any store around here. I can get them from several web stores, and they are not that expensive. The only thing holding me back is that all of the web stores selling them are of the kind with a minimum postage & handling at a level where I have to buy four of those cells for the buying price to exceed the P&H ... I need only one! Maybe I ought to buy another three cranked flash lights I guess I will buy four, then, for a total of almost double the announced item prices.
Can anyone tell: If I put the three extra on the shelf as "spares", will they last longer if they are fully charged? Half charged? Discharged?
Sure - they were the standard on all Norwegian bikes fifty years ago. Maybe even forty or thirty. If they were mounted correctly they didn't drag too much. And if you had used one of those with modern LEDs, you could have had some floodlight!
The cranked flashlight is most important if you are out on some week long mountain trip without seeing any supermarket where you can buy new batteries. Or if you are climbing around in mountain caves and then your ordinary flashlight starts to fade. Solar cells for recharging the battery doesn't really do it in a cave. Not even up in the mountains from November through January if you are living under the Polar Circle. The cranked flashlight is a emergency solution. And, for your week long mountain trip: The weight of mine is no more than 145 grams, with "infinite" battery capacity (as long as you do not run out of food).
Unfortunately, that's the new retro style (really a bunch of years old).
OK - in the past we had zinc-carbon batteries and leakage was always a problem. Then came alkaline batteries. For many years they were the batteries that never leaked. That, however is history.
Alkaline batteries have gotten cheap - very cheap - and then, if you look for the place of manufacture you see why. And I have seen the consequences. How bad is it? I've unused AA alkaline batteries (from a very well know and publicized brand) leak whilst sitting in a drawer - with at least five years left on their "good until" date. So, they've evolved from never leaking to leaking whenever. I will not purchase or use batteries from China. Period.
Now, not to be left out of the picture, I have seen some of my older NiMH batteries also begin to leak. Admittedly, these were off-brand and I've since learned my lesson. A very smart charger I own gave the actual capacities of these 2000 mah batteries (large capacity at the time) to be from about 1400 to 1800 mah. That lesson was, strangely, concurrent with the source of alkaline batteries.
Li-ion . . . . we've seen those flame out pretty often, as well.
Assuming you didn't go way out of your way to get Zinc-Carbon batteries, you've had alkaline batteries leak. If you've not yet learned for yourself, learn from my sad story.
And one day, if we're really all very good, industry will realize that real QC is a good investment in brand loyalty and start making things you don't have to fear before you open the package
I've been saying for years there should be a "parenting" exam before you are allowed to get pregnant / father a kid: fail it and you are "fixed" for life. This would at least raise the IQ of the next generation, if not this one...
"I have no idea what I did, but I'm taking full credit for it." - ThisOldTony
"Common sense is so rare these days, it should be classified as a super power" - Random T-shirt
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