Yes, they did replace the pcb, fan and another connector. I think it wasn't a pcb issue as it wasn't fixed by just replacng pcb, but that's what they claimed and I had to pay. Initial quote was 4k for pcb but then they added fan and battery connector too increasing cost to 5.5k. If I knew you...
Paid amount for Samsung 980 pro 2tb. Remaining warranty on Samsung website is 4 years and 3 months instead of listed 4 years and 8 months, but can make do.
I ended up replacing with APC labelled battery from local vendor for 4500 in Noida. Had purchased the battery extension pack also previously. So to match it went for APC batteries.Will probably try cheaper batteries next time or replacement will get really expensive for both UPS and battery...