From: Kevin Kilzer
Subject: Re: Speakers In a School Locker
Date: Mon, 07 Oct 2002 23:45:20 -0700
Organization: MindSpring Enterprises
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On Mon, 07 Oct 2002 13:58:22 GMT, "Samuel West"
>Problem with that, it is 100% illegal to house a currently used car battery
>without proper insilation inside. Since ya know...if it leaks the fumes
>would kill people and stuff..(that would be bad)
You should pick the battery based on how well it will fit in your
backpack. You will have to carry it home to recharge it over the
weekends. As others have pointed out, a lead-acid can leak. This is
not materially dangerous to people, but will dissolve the bottom out
of the locker and ruin your backpack.
Assuming you run the amplifier only during class breaks, you probably
won't accumulate much more than a few dozen minutes each day. Lets
say 7 breaks of 5 minutes each -- round that off to 30 minutes.
Its unlikely that you will need more than 1 amp at any given time,
since that would be twelve watts, easily enough to fill the hallway
and rattle the nearby locker doors. That means you will need 1/2
amp-hour per day.
If you use 2 6V batteries of 2.5 amp-hour capacity, that will give you
5 days of service. Such batteries will weigh about 4 or 5 kilograms,
and should be easy to transport in a backpack.