Can i ask something about the UPS,i currently using right power F800P,and i have a blackout 3 months ago, and at that time I tried to power the TM BTU and RB5009 only,and the UPS suddenly shutdown after few minutes of usage, does it mean my UPS battery is almost died? (I bought it about 2 years ago,just have the only first blackout from 3 month ago,but i had run a battery test in 2022-actual date i forgot the date probably before blackout)