Compatible 12V 12Ah Mighty Max Battery for APC BackUPS ES750VA & BE750BB

Stej: I had to force the battery into my older APC Back-UPS ES 750 (BE750BB), bending the plastic guides on the way in. The previous replacement battery (BP Werker brand) had to be forced in by the rep at the battery store and took some effort on my part to remove, so I assumed that this was normal. However, once this battery had been knocked in all the way, I found that the cover would not fit back on the UPS. I am currently using the UPS with no cover and will do so until the battery expires. At that point, I will have to disassemble the unit to extract the battery. It is a problem I will address several years from now, as the battery itself works perfectly. It's a mildly disappointing situation, but the price was right.

United States on Apr 26, 2019

RPV Lee: I had some reservations about purchasing this battery initially, since the listed dimensions didn't exactly match the original one in my APC uninterruptable power supply (an older model BE750BB).
It took me 15 minutes to coax the old one out because the fit was tight, plus the battery case had swollen.
The Mighty Max dropped right in with a small amount of clearance. I charged it overnight, and by morning the UPS was back in business.
I'm very pleased with the fit, performance, and value of this Mighty Max battery. Processing, packaging, and shipping were all as expected from an Amazon vendor.
As a side note, I peeled the APC sticker off their OEM battery and found a "BB Battery" (made in China). Apparently that value-added sticker justifies charging twice as much for the battery.
I say pocket the difference and give your old APC UPS a new lease on life with this battery.

United States on Jul 22, 2016

Albert L. Johnson: I foolishly bought this battery after reading all of the comments about it not fitting. It is not even close. The old battery was 2.5" wide and this one is 3.88" wide. Now I have to talk to Mighty Max to see if I can exchange it for an 8 amp version. Amazon needs to take responsibility and quit advertising this battery for the APC ES-750G UPS system. It does not fit - not even close!

I have recently been dealing with Mighty Max Battery who have now sent me three batteries (including the original purchase). The last two batteries sent are 9 Amp Hr. and 6 Amp Hr. respectively which is a lower amp-hr. rating than I was expecting. I have praise for the Mighty Max customer service department. Amazon, on the other hand, needs to not post the advertised model as fitting this model APC UPS.

United States on Mar 17, 2016

soccerchick: I got a lovely wake up call from my UPS' alarm at 5 am. Gotta love when the batteries die on these things... Needless to say, I immediately yanked the battery and started researching my options later. I was in need of a replacement quickly since my UPS is the main hub for my computer, printer, etc. The reviews and price point caught my eye with the Mighty Max Battery. Decided to give it a go and was not disappointed. I'm not sure why people are claiming this needed to be shaved down. It fit perfectly in my UPS. Note that the battery may come completely discharged and just needs some time to recharge.

I contacted customer service in regard to the discharge because between that and a little difficulty with the connectors that I was having (they were quick and courteous in their response), I wasn't sure what was what. But sure enough, after a few hours of charging, the LED came on and all is good.

This is definitely a better alternative than the branded APC battery that goes for almost twice as much plus shipping.

United States on Mar 04, 2016

Gary2: The battery was one of the easier ones I have fitted to a backup. I have probably changed out about 6 over the years. It was a very tight fit, but did go in place without any "modifications"! It was pretty well charged up, so was able to run straight out of the box. Only time will tell, as to how long it will last, but so far - so good!

United States on Jan 18, 2016