# Battery Replacement

- The gel cell battery is much like a car battery. At the end of its life when called on to deliver power, it discharges very quickly without prior warning. The best protection is to replace the battery every 3 years regardless of any test results.
- The battery is a Power Sonic PS 640 or equivalent, 4 AH 6 volts.
- Batteries should be purchased near the time of intended installation, since they can deteriorate over time when stored.

You may order a replacement battery from RACO at the address below:

RACO Manufacturing and Engineering Co.

1400 62nd Street

Emeryville, CA 94608

or from: Power Sonic, Redwood City, CA, USA: (650) 364-5001