This is mostly about how adding the Battery Pack initially causes the main unit's Fan to run continuously. I recently bought a new APC BR24BPG External Battery Pack to supplement my 3-year-old BR1500G which is protecting my PC and monitor, two Tivos, a Cable DVR, U-Verse modem, and a few other small items. My load is around 120 watts typically. Before connecting the battery pack my BR1500G was reporting 6 minutes of battery runtime, but after connecting the battery pack it's now reporting 27 minutes so that's more than i expected. When i first connected it my main unit's Fan did not come on, but about an hour later i ran a Self-Test from the PowerChute software and it Passed, but that then caused the main unit's Fan to come on. Normally after a Self-Test the Fan would come on for a few seconds then shut off and stay off (this is the only time the Fan comes on). But now with this Battery Pack connected the Fan stayed on and continued to run loudly so after a few hours of annoying fan noise i disconnected the Pack and the the Fan immediately shut itself off. I plugged the Pack back in and the Fan came on again and stayed on, even though the batteries show 100% Charged. The Fan noise is way too loud in my quiet Man-Room so i got very concerned that it may stay on permanently with the Pack connected so i googled and saw conflicting posts and reviews - some saying the Fan will always run with the pack connected and others saying that it should eventually turn off after a day or three. So i left it connected and thankfully the continuously running Fan finally shut itself off after about 26 hours and has been off for six days now so i think i'm in the clear. I have since performed a few Self-Tests (passed) and the fan came on normally, but only stays on for about 10 minutes before shutting itself off. Edit: A few days ago we had a 20 second power outage and that caused the main unit's fan to come on - and it continued to run for about 6 hours before finally stopping. I can see why the fan would continue to run while the batteries are recharging, but 6 hours of charging/fan-running to replace 20 seconds of battery usage is kinda ridiculous. And annoying. I'm wondering if the 3-yr-old batteries in the main unit are weak from age and are maybe straining the recharge process. Read full review
Verified purchase: Yes | Condition: New
If you have a large energy eating computer, this is the least expensive way to go to get extended runtime during an outage. At idle my computer is consuming 423W of power. The 1500 UPS without the BR24BPG would provide 14 minutes of runtime, with the BR24BPG attached the runtime is extended to 47 minutes. To replicate this backup time with a standalone unit will cost substantially more.
Verified purchase: Yes | Condition: New
I bought this to extend the battery of my apc backup battery to power a cpap machine in the event power goes out. It extended the life by nearly 180-200 mins! Life saver, literally speaking.
Verified purchase: Yes | Condition: New
Great price and great add on to the 1500g this thing will run the system for 4 hours after power loss ....
Verified purchase: Yes | Condition: Pre-owned
Works fantastic as it bumped my network off power time to 640 minutes.
Verified purchase: Yes | Condition: New
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