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  #1  
Old 01-03-2011, 05:10 PM
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Asimov Asimov is offline
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Default How to convert a 12V battery to 6V

I did this a few years ago & submitted it to various astro forums, however I got 'told off' for supplying 'dangerous info' - Well hopefully the mods here are a bit more broad minded.

To cut a long story short, I cut the thing in half with a hacksaw, making it an effective 6V battery to run my EQ5 mount.

It goes without saying that there are potential nasty side effects involved with cutting a bloody car battery in half with a hacksaw, & you can't just rush into it blindly..

'destatic' yourself first.

ALWAYS wear safety glasses.

Relieve the battery of it's corrosive contents before working on it.

Rinse/flush all battery cells with copious amounts of water.

Wear gloves; preferably heavy welding gloves.

Don't attempt this unless you know all the hazards!

Bear in mind I only did this because I was on a very tight budget at the time - I would suggest you go out & buy a 6V battery if you need one..
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File Type: jpg 6V battery.jpg (34.9 KB, 17 views)
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Old 01-03-2011, 06:53 PM
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Kiddies do not try this at home

"No money is the mother of all invention"
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Old 01-03-2011, 11:19 PM
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Vinnie Vinnie is offline
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Ha, you must have been pretty broke at the time John.

Are you old enough to remember when car batteries were made with the links between cells exposed on the top? A 12V was able to be used as 2V, 4V, 6V etc simply by tapping off the appropriate link
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Old 01-04-2011, 12:43 AM
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I never knew that. My wife did vaguely remember that because her dad used to own an automobile repair shop.
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Old 01-04-2011, 04:16 AM
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Quote:
Originally Posted by Vinnie View Post
 Ha, you must have been pretty broke at the time John.

Are you old enough to remember when car batteries were made with the links between cells exposed on the top? A 12V was able to be used as 2V, 4V, 6V etc simply by tapping off the appropriate link
Yes Vin, I remember those batteries with the exposed links.
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Old 01-04-2011, 09:58 PM
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Lordy, I didn't know you could do that! Nor will I. I wonder what my motorcycle battery would look like inside, it's a sealed gel battery. (And yep, I remember the old batteries).

Off topic a bit, my wife bought a new battery for her van. The guy told her it was maintenance-free. Nope, it ain't. It has the usual two removable caps, three-cells-per-cap. My truck's the same. Argh, gotta keep the distilled water handy.
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Old 01-05-2011, 12:25 PM
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Now I've seen it all.. that should be in the Astronomy Hacks book - Good one Asi
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Old 01-05-2011, 08:07 PM
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I might send the pic to a few battery companies I reckon - I'm sure they'd love it!

Just before I do though, I should quickly carve a few more cells off & make 2/4/6/8V batteries..
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Old 01-05-2011, 10:18 PM
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Quote:
Originally Posted by Asimov View Post
 I might send the pic to a few battery companies I reckon - I'm sure they'd love it!

Just before I do though, I should quickly carve a few more cells off & make 2/4/6/8V batteries..
Maybe some watch batteries?
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Old 01-05-2011, 10:27 PM
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Quote:
Originally Posted by RussL View Post
 Maybe some watch batteries?
Of course Russ! I can see it now - A nice lil' backpack holding the battery & some nice wires running down the sleeve to the watch. You could have a charger in the back pack too of course - Just plug into Walmarts outlet while your doing the shopping..
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C11 carbon fibre SCT/OrionED80+FR/70mm guide scope/14" SW Synscan DOB/optics in new 'spring loaded' skeletal OTA/Non GOTO EQ6/DMK21AU04.AS/DBK21AU04.AS/DBK21AU618.AS/LE modified 900NC/840K/740K/400D + nice glass/'slide on\off roof' observatory.

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