Beef up your UPS
Posted by keelynet on September 5, 2009
[Surferdude] was unhappy with the decreasing life of his aging uninterruptible power supply. He decided to beef it up using marine batteries.
He extended the battery connections outside of the UPS case using #10 wire and swapped the two 12 volt gel cells with the heavy duty lead-acid batteries.
Doing so upgraded the device from 20 amp-hours to 84 amp-hours at a cost of about $160.
If you’re thinking about taking this on yourself, pay attention to the countinuous output rating of your UPS to prevent a fire risk. – (I did this on a 5 year old UPS, just hooked up a 12V car battery and it will run my lights, computer, TV, DVD for nearly 4 hours! – JWD) – Source
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