Posted on 08/21/2012 8:52:53 AM PDT by djf
Thanks. Good price, except it’s probably $14.95 Shipping and Handling...
Is it even legal to send batteries through the mail? I know some items are classified as “hazardous” and you don’t want to be mailing them...
Of all the tags I've pulled off of mattresses I never once experienced a potentially dangerous chemical reaction having resulted.
This is my favorite video showing what's inside: http://www.youtube.com/watch?v=TBQDGvhr3kE
True, very true!
But sometimes ya just gotta take a walk on the wild side...
Like I said, I’m just asking about the feasibility and FReepers experience.
There are probably more geniuses here at FR than at most of the Ivy League schools!
The $30 Streamlight Pro-Tac-1L that I keep in my pocket puts out 110 lumens for HOURS on one lithium battery, whereas those 6V lanterns with incandescent bulbs rarely put out more than 50 lumens. And I can use rechargeable lithium batteries that can be recharged hundreds of times.
I have a Streamlight Strion C4 LED HP that is fantastic!
Lol! Good vid!
Years ago - in the late 60s to early 70s - we had a solar battery charger for dry cell batteries we used on electrical fences. It would keep one of the 9 or 10” long and 2 1/2” wide batteries for months at a time. It was just a trickle charger, but we used one battery for full a year.
Not all are built like that. I saw that video, cut a discharged one open and there were four cells inside that were about 1.25" in diameter.
I am charging three alkaline AAs at the moment with a current of 65mA. I had them on charge for 4 hours last night and they have been charging for 8 hours today without getting warm. If you get one of these battery holder devices which can hold 3, 4, 6 or whatever cells in series from suppliers such as the Chinese Dealextreme.com, you can charge multiple AAs in series. This is the first time I ever tried this and my batteries are in an explosion proof box! (A butter container + scrap of thin plywood to act as a baffle!) So what if they explode, all that can happen is corrosive potassium can be blasted around the place. I am doing this outdoors in a workshop and not too worried what happens.
There is a circuit here and funny account of charging batteries here: http://www.afrotechmods.com/reallycheap/batteries/batts.htm
Sorry I meant potassium hydroxide.
Hi folks, Hi E. Pluribus Unum, great reply.
I have tested recharging carbon and alkaline in the past with good results and I am now making tests again recharging AA alkaline Rayovac cells.
I am using a high frequency radiant pulse charger based on the joule thief blocking oscillator circuit.
Using an air core coil.
Here is a link to my thread describing the circuit and my ongoing tests. The AA cells stay stone cold and I am able to draw .5 watts average from 2AA cells in series for 4 hours or 2 watt hours and the capacity is improving with each charge cycle, so it seems they are being conditioned by this circuit as well.
http://www.energeticforum.com/renewable-energy/12125-alexkor-air-core-coil-radiant-charger-2.html#post206669
peace love light
Thanks! I will take a look at the link.
My results were disappointing. At first, well, right after charging it for a few cycles at 6 volts for about 5 minutes per cycle, the battery was bright as new, bright as all get out.
But when I turned the flashlight on after two days, it was totally dim and barely made the filament red.
As I said, this was totally experimental on my part trying to find out what was/wasn’t possible.
It might be that it would take some type of circuitry. It might be that the battery simply discharged too far, or was at a low charge for too long a time.
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