I need to know if this is a 1300W or an 800W in order to chose the correct heating time. I cannot find my manual. Here is the information: Select Brands Microwave (possibly 2002) 120V-60Hz Single phase 1300W Output 800W, 2450Mhz Model# E8017P-F Serial# 00851125 I'm trying to heat outdoor heated "Snuggle Safe" discs for outdoor Winter cat shelters and I don't want to chose an incorrect heating time and damage these discs because they cost $30 apiece and I have 4 of them.