I've had a Tripp Lite SU1500XLCD UPS for approx. 4 years now, suddenly my UPS started shutting down at 85% with almost no warning time for me to close up shop.
1500va
1350 watts
48v Battery (4 x 12v, 6 Cells)
So I bought a RBC48-SUTWR internal replacement battery pack, ironically after using...