APC UPS control system manual What Various People Have to Say about Batteries

found that it takes several discharge/charges before the runtime calibration is accurate. Take care not to discharge your battery too much as it tends to shorten the battery life.

What Various People Have to Say about Batteries

Here is what John Walker has to say about APC UPS batteries:

I thought I’d pass on some information I’ve obtained which you’ll probably eventually need. Besides, by writing it down I’ll be able to find it the next time. I started installing mine in 1995-1996. Lead-acid batteries have a finite life even if not subjected to deep discharge cycles. For the batteries used by APC, this is typically four to six years. As part of the self-test cycle, the UPS measures the voltage of the battery at full charge (which falls as the battery ages), and if it’s below about 90% of the value for a new battery, it sets off the “Replace battery” alarm, which it repeats every day. [on apcupsd versions prior to 3.8.0, this message is sent once, on version 3.8.0, it is sent every 9 hours - KES]. You will occasionally get a false alarm. It’s a good idea if you get an alarm to repeat the self-test the next day and see if the alarm goes away. If the alarm is persistent, you need to replace the batteries, which can be done without powering down the UPS or load-you just open up the battery door, take out the old batteries, and hook up the new ones.

APC makes “Replacement Battery Units” for each of the Smar- tUPS models, but they sell them directly only in the U.S.

It’s best to wait until the low battery alarm before ordering a replacement-keeping batteries on the shelf reduces their life un- less you keep them fully charged.

And Andre Hendrick says:

[For replacement batteries] You need to goto you your local Yamaha SeaDoo shop. There are 35 AMP Hour deep cycle ma- rine batteries that are direct replacements. These are gel-cel and will double the runtime and/or cut your recharge time in half.

Jet Works

1587 Monrovia Ave.

88