How to extend the life of your UPS?

I will tell you a secret that no UPS seller would tell you.  Here is the neat trick to extend the life of your UPS: UNPLUG IT WHEN YOU'RE NOT USING THE COMPUTER.  But isn't that contrary to what is written in the intruction manual.  EXACTLY.  The explanation behind is quite simple - the unit will continue to charge if you keep it plug all the time and that will eventually destroy the battery because the battery is already fully charged.  In addition, you need to discharged the unit at least twice a year before charging it to keep it in good contition.  Don't forget to HIT THANKS if this helps :)