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12 volt dc power supply


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Summary: Electrical Power Question: I have a tennis ball machine manufactured in 1998. It has a rechargeable 12V 12Ah battery but plugs into an a/c outlet to recharge.


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Electrical Troubleshooting: 12 volt dc power supply


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Electrical Power Question:
I have a tennis ball machine manufactured in 1998.

It has a rechargeable 12V 12Ah battery but plugs into an a/c outlet to recharge. It has two 12V DC motors that run the ball-throwing-wheels.

I've been through a number of expensive batteries.

Is there a way to rewire this so that I can plug in and run it only on a/c?

When I unplug the battery, everything stops working.
Steven S.


Hi Steve - Great Question!
You may consider purchasing a 12 Volt DC Power Supply which is rated for the watts of the motors.

You should be able to disconnect the battery unit and connect the wires that used to go to the battery and connect them to the power supply.

For example, I found a Radio Shack 22-506 and saw this model as a possibility. The key is to make sure the power supply will handle the motor loads rated at above the total watts of all the motors.

Make sure the power supply is fuse protected. Try to find a power supply that is rated for outdoor use.

You should plug your power supply into a GFCI protected receptacle when in use outdoor. Understand that altering the original design of your unit will void the UL Listing and most likely the Warrantee.


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