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Possibly Dumb Question re:Battery as a power supply

I have bought a new Clearaudio Performance DC Wood turntable.  I plan to drive to the dealer in Atlanta and pick it up next Wednesday.  I have seen the wall wart power supply which comes with the TT, and it is not a pretty sight.  Clearaudio sells an upgraded 12V battery and charger supply for "only" $1,200.00.  I don't wish to present myself as a parsimonious individual,  but $1,200.00 seems a bit steep to me.  I am wondering what problems would ensue if I bought a moderately sized (say 25 or 30 lbs.) , sealed, lead acid, 12V rechargeable battery; attached the proper wires to connect to the TT, and used it as a power supply.  When the battery runs down I could just take it to my workshop and use my electronic, automatic battery charger I use to recharge car, truck and tractor batteries to bring it back to full power.  As little current as the TT uses this shouldn't be too frequent a chore.  It is just a possibility, but if it is feasible I might try it.  I would really appreciate any and all comments, criticism or warnings.
kingharold
eastein
97 posts
 
You should be able to get by with a much smaller battery.  Thales tables are battery powered with a pack that looks like 4 or 5 AA batteries. This is their description: The outstanding feature of the TTT-Slim II is the battery based power supply with Li-Ion
accumulators. The peak capacity is higher than 100 W while using not one single vibrating element. Therefore it is possible to integrate the power-supply into the main chassis, keep the signal-path short and skip any connection to the power plant. The battery service life is 20 hours
mr_m
1,900 posts
 
Great advice Jim. Battery vapors are very toxic.
millercarbon's avatar
millercarbon
12,531 posts
 
The smaller battery is the way to go. My Teres turntable was DC powered just like this, with a charger on a relay to automatically disconnect it from AC while playing. It is better that the charger be disconnected. The difference is slight, but there.  

Mine was an ordinary lead acid motorcycle battery, but that was decades ago. Today I would look for Li-Ion, ideally one small enough to fit right into the unit. 
tomstruck's avatar
tomstruck
350 posts
 
I have a Performance DC I use a linar power supply made by McRU
in the UK when I first got the TT I used the wall wart and using
Clearaudio stroboscope test record it showed a slight drift in speed after switching to the linear supply speed is spot on I do use a battery power phono stage Musical Surrounding Nova II  you can check out my system in Virtual Systems

Enjoy the Music
Tom
kingharold OP
304 posts
 
Thanks for the responses.  I hadn't considered that a fully charged 12V battery can provide 13.5 volts.  Perhaps a bit more research is needed.  I sure wouldn't want to mess up my first new turntable since I bought my VPI HW19 thirty or so years ago.Does anyone have opinions about TeddyPardo linear power supplies? That is another possibility
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