put this in your flashlight!
- Thread starter snakebite
- Start date
Tree
Flashlight Enthusiast
It could power a 5mm LED for... well... a long time.
Rothrandir
Flashaholic
/ubbthreads/images/graemlins/eek.gif
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FreeBSDboy
Newly Enlightened
Oh what fun you can have with enough electricity to kill a large elephant /ubbthreads/images/graemlins/smile.gif /ubbthreads/images/graemlins/smile.gif /ubbthreads/images/graemlins/smile.gif
Rothrandir
Flashaholic
or a herd of large elephants...
LED_ASAP
Enlightened
[ QUOTE ]
zmoz said:
The amount of self disharge on that thing is probably a few amps... /ubbthreads/images/graemlins/ooo.gif
[/ QUOTE ]
Actually no---lead/acid battery has the lowest self-discharge rate among most common rechargables. That's why you can have a car in your summer cabin and come back 9 months later and still have enough charge to crank the engine. /ubbthreads/images/graemlins/tongue.gif
zmoz said:
The amount of self disharge on that thing is probably a few amps... /ubbthreads/images/graemlins/ooo.gif
[/ QUOTE ]
Actually no---lead/acid battery has the lowest self-discharge rate among most common rechargables. That's why you can have a car in your summer cabin and come back 9 months later and still have enough charge to crank the engine. /ubbthreads/images/graemlins/tongue.gif
IlluminatingBikr
Flashlight Enthusiast
- Joined
- Feb 26, 2003
- Messages
- 2,320
I think that might be the first battery that the LED/LS would burn out before the battery went dead! /ubbthreads/images/graemlins/icon15.gif /ubbthreads/images/graemlins/grin.gif /ubbthreads/images/graemlins/thumbsup.gif
Roy
Farewell our Curmudgeon Administrator
Our local nuclear power plant offered our local Ham radio group some of their sruplus batteries. We had to turn them down...each 1.5 volt cell was about a foot square and 5 feet high! They would not fit in the repeater shack and would have needed a frontend loader to move.
Tomas
Banned
Large lead-acid battery strings are fascinating (to me, at least). The office I worked in from 1971-79 had several battery strings in the basement. (A telco office does not run on commercial AC power - the equipment is always running on the batteries and the commercial AC is just there to keep the batteries charged.)
Anyway, there was a small 24V string (about 4000AH) a small -130V string (about 1000AH) a medium sized +130V string (about 8000AH) and 4 -48V strings (totalling about 60,000AH).
The copper power busses and main fuse panels were a hoot: Ever seen an 8000A fuse? /ubbthreads/images/graemlins/ooo.gif
The office I was in was not all that large (4 floors of equipment with batteries and two 500KW diesels in the basement). The larger offices (for example the two side-by-side 15 storey buildings with a common power room in their shared basement in Seattle) were a bit wilder.
(The first telco office I worked at had a GE turbine on the roof for backup power that ran three floors of equipment, each about a half a square block, without breaking a sweat. Sure got the neighbor's attention when it ran, though. /ubbthreads/images/graemlins/grin.gif I recall seeing the bill for JP3 fuel for that turbine once - about $3600 for a 6 hour emergency run.)
Anyway, there was a small 24V string (about 4000AH) a small -130V string (about 1000AH) a medium sized +130V string (about 8000AH) and 4 -48V strings (totalling about 60,000AH).
The copper power busses and main fuse panels were a hoot: Ever seen an 8000A fuse? /ubbthreads/images/graemlins/ooo.gif
The office I was in was not all that large (4 floors of equipment with batteries and two 500KW diesels in the basement). The larger offices (for example the two side-by-side 15 storey buildings with a common power room in their shared basement in Seattle) were a bit wilder.
(The first telco office I worked at had a GE turbine on the roof for backup power that ran three floors of equipment, each about a half a square block, without breaking a sweat. Sure got the neighbor's attention when it ran, though. /ubbthreads/images/graemlins/grin.gif I recall seeing the bill for JP3 fuel for that turbine once - about $3600 for a 6 hour emergency run.)
tvodrd
*Flashaholic* ,
Oooo, mercury ringer interrupters, crossbar switches (Post step relays)"miles" of batteries, and all of it below ground/EMP-hardened. I've had the opportunity to tour a few "switches" over the (many) years, and they were a trip!
Larry
Larry
I worked at Gould Electronics 30 years ago before it sold its battery operations off. I remember that the old industrial and automotive battery plants in the early 1970's really cleaned out my sinuses with their sulfuric acid vapors from the "forming room" where acid was first introduced to batteries.
You should have seen the battery arrays they made for diesel submarines. Occasionally governmental ordering paperwork snafus could keep special ordered multiple submarine battery suites in finished goods for months at a time.
You're lucky not to have seen the lead dust that was everywhere.
You're lucky not to have worked in an environment where people whose monthly blood tests showed "excessively high" lead levels were transferred to "cushy" jobs outside the hot inner areas with acid fumes and lead dust. You're lucky that you weren't one of the unfortunates who then had company pressure to have your blood kilated (sp?) so that you could go back into the forming room quicker.
You're lucky that you didn't work next to people whose mindset actually motivated a few to dip their sandwiches in lead dust in order to get easy duty assignments.
You should have seen the battery arrays they made for diesel submarines. Occasionally governmental ordering paperwork snafus could keep special ordered multiple submarine battery suites in finished goods for months at a time.
You're lucky not to have seen the lead dust that was everywhere.
You're lucky not to have worked in an environment where people whose monthly blood tests showed "excessively high" lead levels were transferred to "cushy" jobs outside the hot inner areas with acid fumes and lead dust. You're lucky that you weren't one of the unfortunates who then had company pressure to have your blood kilated (sp?) so that you could go back into the forming room quicker.
You're lucky that you didn't work next to people whose mindset actually motivated a few to dip their sandwiches in lead dust in order to get easy duty assignments.
Willmore
Enlightened
The battery backup for the switch I used to work next to (mobile phone provider) was a 'little' 3/4 MW*h array. Can't fit them in my trunk.....
We change those batteries every other day at work. You have to hoist them up with chains and set them down carefully in the center of the forklift and then put the seat over top of it. VERY HEAVY battery there. See that grey connector on the end?, that means it's a higher power battery. If it has a red connector, that means it's lower powered.
