Compatible with APC Back-UPS CS 350 12V 9Ah UPS Replacement Battery Beiter DC Power

Worked like a charm. Popped the old battery out, put whatever was on it on this, popped this one in, and was able to get my UPS back up and running (and working) without having to buy a new one. I've used this brand for a few of my other ones as well, and it seems to work really well.

This is my second purchase of a replacement battery from this vendor for my APC CS350 backup power supply. These batteries are a perfect fit and will last approximately 5 years before they need to be replaced. Word of warning, use caution when replacing the battery. My old battery must have developed a small leak in the seal and some of the battery acid leaked out onto the carpet ... the carpet was destroyed in a matter of seconds.

Good quality and good price

Battery is exactly as illustrated. Used in our burglar alarm, not in a UPC. Working perfectly.

This replaced a 5 year old version of the same battery. It was a pre-emptive change as the "replace battery" indicator had not come on. The terminals are the correct size and fit tight (APC CS350 & ES550).

The batteries in the UPS power supplies get old and start to lose their ability to hold a charge. When that happens the UPS starts emitting an obnoxious alarm sound. Since Murphy's Law rules the universe, this happened late at night when we were asleep. I had to unplug the computer from the UPS and turn it off. I immediately ordered the replacement batter. The replacement takes a couple of minutes and is very easy.

Stay away from Power King UPS batteries. I own 8 UPS devices and have swapped out the batteries on all of them multiple times over the years. This is the first battery I purchased that gave me only 6 months before dying. Every other purchase battery has given at least 3 years. My first clue should have been the weight of the battery compared to the one that was in the UPS prior this one is slightly lighter which means the cells internally are less dense.

Supppsed to be the replacement model for our battery. The terminals are set up differently and so we had to spend more money to get adapters.