Mighty Max Battery 12V 8Ah UPS Battery Replaces 7Ah 28W BB Battery SH1228W - 2 Pack

The batteries work fine but if you are using them stacked in a UPS, be extra careful to note how the wires are connected before separating the old batteries.

Update Jan 2021: Finally my first MightMax battery (from Oct 2017) died. Not bad considering a $35 battery pair lasted 3yrs+. Granted, they were mostly running on STANDBY, I never had an extended blackout lasting more than 10 seconds - because I have an automatic whole-house standby generator that comes on after 10 seconds. So while there is a NEWER model (9Ah instead of 8Ah, for $5 more - effectively increasing backup run time by 28% from the original 7Ah battery in my CyberPower 1350VA, CST1300AL), these will do just fine for my purposes.Top tip: to keep track of things, if you have a label printer, stick on the install date (maybe even model number) of your battery on the outside of the unit so you know from a glance how long it has been since your last battery change.Also; one thing to keep in mind, over the years, you may see improved battery capacity (the "Ah" rating going up for the same sized battery), but it does not mean it will make your UPS produce higher watts. It will only make it run slightly longer when on battery power.Updated review Mar 2019: I'm happy to report everything is working fine. Another couple of my CyberPower UPS (1350VA, CST1300AL - with original batteries) have died since and I've bought more of these to replace them - most recent one being just a week ago. None of the Mighty Max batteries (including my original Oct 2017 purchase) are having any issues so far, so I'm very happy with the purchase and will pretty much use my UPS's indefinitely by simply swapping dead batteries out when they go out. I have 3 of these UPS models in my home and all 3 have now been replaced with Mighty Max batteries.Original review: Oct 2017: My Cyberpower 1350AVR died and rather than buying a new UPS unit, swapping out the battery saved me a bunch. The factory battery was BB Battery. I have never heard of BB Battery! Tell me Yuasa, Panasonic, sure. So I figured Mighty Max is probably the same level as BB. It even has a 1Ah advantage! I kept the original battery intact until these Mighty Max's arrived. I pretty much disassembled the twin battery assembly and immediately reassembled it back in the same way. The adhesive sticky tape that held the 2 batteries together was weak, so I replaced it with some 3M packaging tape, and put the original tape pull tab back over it. I can't say I've tested the battery run time, but the battery meter shows full now, so I guess I'm happy with it. Will have to wait for an extended blackout to know if these are as good as the originals.

Update July 31, 2019: The batteries and UPS are still going strong but guess what? Another 1350AVR died on me 2 days ago, exact same symptoms. I came here to order another set of replacement batteries to fix the latest dead UPS and figured I’d update my review. You’re welcome! 😁My CyberPower 1350AVR died...power light started flashing and there was a clicking noise. I found a YouTube video that showed the same problem and exactly how to replace the batteries. Search YouTube for “Replacing or rebuilding the battery pack in a CyberPower 1285AVR UPS”. The 1285AVR looks exactly the same as the 1350AVR. Replacing the two batteries was easy peasy; the UPS is working normally and reports 100% battery capacity. If the batteries die an early death I’ll update my review.

Good price, fast delivery. Only downside is that the terminals are wrong. My SH1228W's have F2 terminals, these have F1. I had to order somewhat ridiculously overpriced F1 to F2 terminal adapters.

Had two non-usable UPS units and for small investment, both are back and working!

I have Mighty Max batteries in my Harley, generator and ups'. They work, have the claimed power, and last a long time.

Batteries arrived ahead of scheduled delivery date. Installed and working properly.

just what i wanted for replacement