UPS 9Ah, 24VDC VRLA Battery Replacement APCRBC124 Compatible with APC UPS Models BR1000G, BX1350M, BN1350G, BX1000G, BX1300G.…

Works. Take the old one out. Put this one in. And Charge the thing. Now you'll be backed up again. Good price. A lot better than the OEM. And if it gets half the time before it goes dead than the one that came with my original UPS, then it's a bargain. Guess I'll see, but so far, so good.

Quick and easy install. Worked great.

Perfect fit and easy to install!

Easy to replace and works great.

It fit our BackUPS XS 1500 perfectly. Based on the system load of 9%, I was hoping for a 30 to 45 minute runtime. The display shows only 14 minutes. As we are using it with a Mac, we can't use PowerChute to run a self-test to see if it would re-calibrate with the new battery. That's an APC issue and not the fault of this battery.

This battery package slid right into the underside of my UPS and looked just like the replacement OEM one that was at least 3 years old it replaced.It immediately started working and the display was showing time left to dead and everything else just like the old one when it was good.I have two large tower boxes hooked up, not low power PC's, and they're drawing around 275 watts and it has 16 to 17 minutes run time.At 200 watts it's about half hour run time.It took about 5 minutes to swap the battery, it took more time to unplug everything so I could slide it out enough to put it on its side to pull the battery cover and slide the dead one out and the new one in.The big question will be how long it actually lasts and time will tell but they average about 3 to 5 years and a quality built battery.You can't beat it for the price considering it's ready to drop in outa the box so as long as I get decent life out of it it's great. I will try to update if anything changes.

The RBC123 (7Ah) battery that came with my APC BR1300G purchased in March 2020 failed after exactly five years in March 2025, when the UPS began audibly switching into charge mode every few seconds while the battery heated up the entire chassis (only 8 minutes of estimated run time remaining with 100% charge for a 30W load). I ordered this SafeAMP RBC124 (9Ah) equivalent battery for next day delivery and had no trouble hot-swapping by simply tipping the UPS on its side, removing the bottom cover, pulling out (thus unplugging) the old battery, and pushing (thus plugging) in the new battery (the red sticker says, "LIFT AND PULL TABS" but should not be removed as it and the green sticker on the other side hold the two modules together). After 12 hours with the new battery, the UPS still showed only 8 minutes of estimated run time remaining with 100% charge for a 30W load, so I performed the calibration procedure clearly documented on the APC web site (FAQ answer FA284198). The PowerChute software is not necessary (or even available for MacOS). Here are the steps I followed using incandescent light bulbs for a stable load:1. Disconnect the Ethernet cable so the computer won't interfere as the battery gets low.2. Disconnect all critical loads from the UPS since they will lose power and shut down ungracefully when the battery is depleted.3. Attach at least a 30% load that does not fluctuate more than +/- 5%. THIS IS IMPORTANT!4. Unplug the UPS from utility power so it operates on only battery power.5. Allow the UPS to run on battery power until it turns off completely (the UPS fan will switch off after the load drops).***NOTE: If the stable load is not at least 30% or if the procedure is ended before the UPS drops the load, it will not calibrate properly!6. Disconnect the stable load, reconnect the critical loads, plug the UPS back into the wall outlet and allow it to recharge.While recalibrating, the UPS ran far longer than 8 minutes before shutting off (since the UPS based that estimate on the old, failed battery), and after 12 hours it showed 100% charge with estimated time remaining consistent with the Run Time Graph on the APC web site page for the BR1300G. Success!Some reviews claim that this battery arrived dead or defective, so perhaps steps to recalibrate the UPS should be included in the package for awareness and to avoid unnecessary returns...

Easy to install and saved a bundle. We use our UPS to power the devices in our media room (OLED TV, Denon AMP, two Sony DVD Changers, a ROKU box, our cable modem, our router, our home automation server, and a network file server), so a working UPS is an essential element of both our media room and our home network. This was one third the cost of a new, comparable UPS, and well worth the cost. Just to be safe, I watched a YouTube video on the install, but it's so simple I could have done it without watching. We disposed of the old battery with a local recycler who handles these kinds of batteries (you shouldn't just throw them in the trash!).