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forum threadeduardmc posted May 12, 2026 12:45 PM
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forum threadeduardmc posted May 12, 2026 12:45 PM

CyberPower CST135XLU Battery Backup UPS 1350 VA / 810 W, ft. cord,l $79.99

$80

Newegg
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https://www.newegg.com/cyberpower...6842102459

Reviews arent great with dead batteries on arrival since it seems to be old shelf unit but it's covered brand new underwarranty including batteries replacement.
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https://www.newegg.com/cyberpower...6842102459

Reviews arent great with dead batteries on arrival since it seems to be old shelf unit but it's covered brand new underwarranty including batteries replacement.

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May 12, 2026 01:02 PM
824 Posts
Joined Nov 2012
mvpcrossxoverMay 12, 2026 01:02 PM
824 Posts
The reviews are concerning. newegg shipping out paper weights according to buyers
1
Original Poster
May 12, 2026 01:08 PM
3,604 Posts
Joined Mar 2006
eduardmc
Original Poster
May 12, 2026 01:08 PM
3,604 Posts
Quote from mvpcrossxover :
The reviews are concerning. newegg shipping out paper weights according to buyers
I ordered one. Worse thing that could happen is get another unit or new batteries under warranty.
Pro
May 12, 2026 01:17 PM
10,103 Posts
Joined Nov 2011
deelseaker
Pro
May 12, 2026 01:17 PM
10,103 Posts
Every single review is 1 star and reports a dead battery. I don't see how it's a deal if you are guaranteed to be dealing with a warranty replacement right out of the box?
May 12, 2026 02:46 PM
235 Posts
Joined Aug 2010
alford01May 12, 2026 02:46 PM
235 Posts
Quote from eduardmc :
I ordered one. Worse thing that could happen is get another unit or new batteries under warranty.
Some of the reviews say the units are over 7 years old and past the warranty
May 12, 2026 03:35 PM
732 Posts
Joined Dec 2006
jojocatMay 12, 2026 03:35 PM
732 Posts
I'm pretty sure you have to pay the shipping back to cyberpower to return a defective unit. Anyone had a different experience?

Due to weight these are expensive to ship.
Pro
May 12, 2026 06:49 PM
9,875 Posts
Joined Mar 2018
WooHoo2You
Pro
May 12, 2026 06:49 PM
9,875 Posts
Quote from deelseaker :
Every single review is 1 star and reports a dead battery. I don't see how it's a deal if you are guaranteed to be dealing with a warranty replacement right out of the box?
FWIW, we had a rash of dead batteries involving UPS's at work. Like dozens. No one was RTFM...the batteries in those UPS's ship disconnected. Not saying that is the situation here but could be or a similar issue.

Regardless, anyone know if this would work for a 3d printer to help calm down LED lights flicker on the same circuit? My understanding is 3D printer plugged into line interactive UPS should (in theory) filter much of this noise out. If it matters Flashforge Adventurer 5M, PSU wattage 350. Also bonus points for a CYA for the printer to have a battery backup for brief outages.
Original Poster
May 12, 2026 07:33 PM
3,604 Posts
Joined Mar 2006
eduardmc
Original Poster
May 12, 2026 07:33 PM
3,604 Posts
Quote from jojocat :
I'm pretty sure you have to pay the shipping back to cyberpower to return a defective unit. Anyone had a different experience?

Due to weight these are expensive to ship.
Warranty is after the purchase date. Not how old the unit was made

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Original Poster
May 12, 2026 07:35 PM
3,604 Posts
Joined Mar 2006
eduardmc
Original Poster
May 12, 2026 07:35 PM
3,604 Posts
Quote from jojocat :
I'm pretty sure you have to pay the shipping back to cyberpower to return a defective unit. Anyone had a different experience?

Due to weight these are expensive to ship.
They ship you replacement battery (free of charge) if your battery is dead or defective. Review dont mention bad unit just bad battery.
May 13, 2026 02:30 AM
732 Posts
Joined Dec 2006
jojocatMay 13, 2026 02:30 AM
732 Posts
Quote from eduardmc :
They ship you replacement battery (free of charge) if your battery is dead or defective. Review dont mention bad unit just bad battery.
First reviewer mentions having to get an rma and ship it.
Original Poster
May 14, 2026 05:48 PM
3,604 Posts
Joined Mar 2006
eduardmc
Original Poster
May 14, 2026 05:48 PM
3,604 Posts
This is why you dont listen to most review. Or slickdeak comments thinking they know it all. Got mine, came brand new. Charge for 8 hours. Tested with a mini fan, disconnected from power, run it 50 minutes on battery no problem. Connected to my nas and then powered down. Left Nas running for 25 minutes. 3 years warranty from manufacture for $80 heck of deal and most probably didnt get it from people posting without having any hands on experience with it.

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