ExpertPower EXP1290 12 Volt 9 Amp Rechargeable battery

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.

Battery is direct replacement for a Monster 360 Bluetooth speaker. Fully charged for 7 hours and device works again.

Battery was dead in my bluetooth speaker. This was an exact fit and was charged up. Works great.

I've had my Cyberpower 1500PFCLCD UPS for about 4 years now. I noticed that despite no indicated internal battery problems, the UPS would fail during brownouts or other equipment being turned on. It did not use to do that. To validate, when I have my UPS connected to the wall (with zero loads plugged into it) and I disconnect the AC mains from the UPS, the unit would insta-power off instead of staying on (and running from battery power). This is the classic symptom of a dead internal battery! Anyways, Replacing the battery was straightforward. I picked up a pair of these Expertpower EXP1290's instead of shelling out more than double for the Cyberpower (supposedly) original battery. In reality, the 'original' batteries are Leoch DJW12-9.0's. These batteries arrived about 3/4 charged (~12.74 VOC), in a well protected package. Delivery was quick (2 days). After replacement, the UPS now behaves normally and correctly stays on / runs from battery when it's disconnected. No error messages or other silliness. Also, for what it's worth these terminals on this battery actually fit the internal connectors 'better' than the original. Your milege may vary on that tho, I'm sure it's game of sub-millimeters. While I cant yet confirm if these batteries will last as long as the original; their value is spectacular when compared to the original batteries. Operation looks good. I will update this review in the next few months if anything untowards occurs -- which I doubt. Highly recommended!

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.