Check at ER5: found 6 battery UPS are bubbled, turn on breaker for battery make sign that battery are not normal advise replace all battery UPS total 8 battery. Check ER4: battery UPS are normal and there is no fault indication at panel. Check ER3: found at panel UPS at bypass, found 1 battery is mark bad condition, advise replace battery UPS total 8 battery ( AGUS & PENY & ADI )