EXP1290, 12V 9AH SLA AGM Rechargeable 12V Battery Backup

My APC UPS-900 surge protector and battery backup has worked reliably for about 5 years, which is right in line with the typical 3–5 year battery life expectancy for units like this. It has kept my PC, modem, and router running through short outages, and also provides protection for sensitive electronics during surges. In longer outages, it has even powered a cordless phone and VOIP system for overnight operation. Recently, I noticed the backup time had dropped significantly—down to only a few minutes—indicating the battery was at end of life. I was initially unsure about replacing the battery myself, but the process turned out to be very straightforward. After installation, the unit is operating like new again. For a fraction of the cost of replacing the entire UPS, this was a very cost-effective repair. Given how simple the swap was and how well it restored performance, I would absolutely recommend replacing the battery rather than replacing the whole unit if you encounter similar symptoms.

This battery fit my lobster tennis ball machine perfectly. It fit the terminals, they are F-2 size. The battery took the charge with no issues. It just doesn’t last a long time. Overall I recommend this battery, it is good for the price.

Can't beat it for the price. Replaced a pricey seadoo underwater scooter battery. Lasts a lot longer than the old one. Seadoo says you need a special battery or risk explosion....this looked identical to the factory one. Save your money

Excellent replacement for CyberPower CP1500PFCLCD UPS batteries. Much cheaper and exactly the same as the OEM brand. They are hefty and well made. Taking out and replacing the batteries in the right configuration is super easy. Closing the dumb housing can be tricky due to the heavy gauge wires, but that's the quality you expect. Hoping these last 12 years like the original set.

This battery was used in a gas scooter for starting. It is now a year old and the starter barely turned. The battery voltage looked good but fell to 9V under load, so I bought a new (different) battery. However, it did no better, so the battery wasn't the problem. I have hads a lot of batteries like this one fail a lot sooner, so I am happy with this battery manufacturer and would recommend them.

When Craftsman designed their Battery Start Lawnmower in the 1990's, they supplied a $90.00 small battery pack to start it with. It was 6 small D sized NiCad batteries inside a box that was used to start the mower with. The previous owner didn't want to spend $90.00 on a replacement battery that would go bad in a short time. Over the years the NiCad batteries deteriorated, and that is why I got my lawnmower for free from the sidewalk in my neighborhood. I modified the battery chamber to accept a small Walmart small lead acid battery, but they too seem to go bad in 2-3 years. I bought this 12 volt 9 Ah LiFePo battery to see if it will last longer than 2-3 years. It starts my mower much better than the Walmart lead acid battery, and now I have a fully functional 30+ year old lawnmower again. The lawnmower magneto recharges the battery when it is running, and I haven't had to charge the new LiFePo battery in between uses of the lawnmower at all. The onboard BMS system inside the battery manages the charging routine when the mower is running and it seems to recharge it well. Hopefully this battery will make my vintage lawnmower work for me for many more years. I am building a padded steel box to secure this new LiFePo battery to the mower deck because it is too large to go into the original small battery compartment of the mower deck. Stay tuned to see just how long this new battery technology battery lasts, but for now it is working very well.

Got this to replace the battery in my very old Cyber Power 850VA. It took about 10 mins to pull the old battery out and plug in the new one. Plugged everything back in, turned the UPS on and ran the self test in the CP software utility. Success! UPS working perfectly with the new battery.

This worked and fixed my older CyberPower CP850AVRLCD UPS. The previous battery died (measured 1.8V), and after hitting the power button, the UPS would turn on, the LCD would light up briefly, and then it would power off after just a few seconds. Replacement was easy, remove four screws on the bottom plate, slide the old battery out, unplug the terminals and reverse the process with the new one. Seems to be working fine now for much less than replacing the entire unit. I use the UPS primarily for brown-outs and flickering power so I cannot comment on how long it stays on during a full outage.