APC UPS Battery Replacement, RBC48 Smart-UPS SMT750, SMT750US, SUA750 and Select Others

Got the dreaded replace battery light and just purchased a new UPS. This unit sat around until I needed it and I purchased this battery. Got my old UPS going again.

After 4+ years of using an APC UPS as a backup for my pellet stove, I started getting the Replace Battery alert. I wanted the OEM APC battery but it was backordered so I tried a generic replacement. The generic was defective and couldnt power the stove fan for more than a few minutes. The OEM could run it 45 mins.Returned the generic. Popped in the APC OEM into the UPC in less than 2 minutes and UPS now runs perfectly again.

I purchased this unit to replace the original batteries in my APC Smart UPS 750 that I've had for many years. The replacement batteries were easy to install and resolved the problem immediately. Unfortunately, the replacement batteries failed about a year in a half later. (Purchased September 2021, failed May 2023.) But, I called APC and they sent me a replacement under warranty with my proof of purchase from Amazon. I am very happy with that outcome, and would absolutely buy a new Smart UPS or another set of replacement batteries from APC again in the future.

I bought this battery at the end of 11/2017 and installed it in 12/2017 to replace the same battery we had installed 4 years prior. We had a power outage last week, 3/2018, where this battery went completely dead. "Great", I thought to myself, "This is designed to keep things running in case of a power outage. I am glad I had this!" WRONG! During the power outage, the UPS went completely dead. This is not the UPS fault, as it is designed to last only so long. BUT, after the power was restored, the unit is now saying to replace the battery (it did not say that before we had the power outage). So either the battery only lasted 4 months, or after one complete discharge cycle, the battery is completely worthless. Either way, what the heck APC? Really?What is the point of buying a battery powered backup power supply if the battery is completely worthless after 1 power outage?! Or even worse, after only 4 months of service?! I would suggest going with a different brand, or depending on the frequency of your power outages, buying a generator. It would probably be cheaper in the long than having to buy a new battery after every power outage.

I replaced the battery in my Smart-UPS 750 APC unit with this, lasted 6 years which is beyond expectations. Normally that would be worth 5 stars, however the recent failure was such that the battery was too hot to touch when I went to replace the APC unit. Since I'd already replaced the battery once, and the APC UPS was now over 11 years old, I opted to replace the entire unit. I ended up with a full sine wave Cyberpower instead of APC. This proved justified when I was finally able to remove the APC's battery (once it had cooled down), the battery itself was warped and cracked, and I was not at all happy that the electronics kept pumping power into the failed battery until it was near meltdown. This reflects poorly on the electronics in the APC more so than the battery itself, so only 1 star reduction.

Perfect 1 to 1 replacement for our SMT750. Installed easily and was recognized instantly. Also qualifies you to request a free shipping label from APC to recycle your old battery properly, which is easy to do using the box this comes in.

Bought for a server battery backup. Works great. Would recommend this product.

worked like a dream