Casil 12v 7.2ah Rechargeable Battery - APC UPS Replacement Battery for SMT750US, SUA750, SMT750, (RBC48), UPS Batteries, 12V 7.2Ah Deep Cycle Batteries with F2 Terminal 2 Pack

I've ordered this batteries to refresh my 6 years old APC-UPS SMT750 which was beeping constantly because of completely degraded batteries. I received this batteries fully charged and without any leakage or other damages. Considering the fact that they were shipped for at lease 24 hrs, their 12.85V respectively 12.84V must have been a real charge and not some "let's charge them short before shipping". Because of SOC and assuming there were not charged additionally before shipping this cells must be pretty new. I did not test capacity, but there seem to be some issues: according to APC website my UPS model with genuine batteries should have a run time of 1hr4min @ 80watt load. But with this new batteries and after installation & calibration the unit shows only 2760 seconds (46min). This is only ~72% of what it should be, even less considering claimed 7.2Ah of this batteries compared to 7Ah of APC batteries! This makes me assume that the claimed 7.2Ah of this batteries are not accurate or something else is wrong. I also know that APC's claim of over an hour runtime is more like lab/advertising data and probably not real-life data. To be fair I gave 5 stars since you need to go through full capacity test for each battery to know the real capacity. I wasn't able to do this, but honestly for $/Wh price this batteries are still a good deal if they last at least 50% of genuine lifetime (in my case 6 years). Only time will tell. UPDATE: Estimated battery time in my UPS is showing 57 min. now. This is more acceptable than previous 46 minutes. I think the changing run time of my unit is an internal UPS thing and does not have anything to do with real capacity of the batteries. For now I'm very happy with this purchase. Longevity is still to find out.

Works well. Hope they last.

Purchased for a battery backup for a computer. Works fine.

Worked perfectly and was a direct replacement.

I don't know how well this works, but probably about as well as the cheap no-name Chinese batteries that APC now sells for 3-4 times the price as their "official" batteries. My last official APC battery purchase resulted in 11 months of light-duty service before the UPS started rejecting them. If these cheapo Casil batteries can make it past 11 months, they will be better than the proper APC batteries. I'll try to come back and report on them in just under a year. edit a couple months later: DOESN'T HOLD A CHARGE! What is going on? When I try to calibrate my UPS, the battery has about 10 seconds of charge. What a piece of junk. As bad and expensive as the APC "official" batteries are, this is somehow much worse. Don't waste your money.

Perfect replacement battery with very easy installation.

We have ordered several 2-packs of these batteries for use in APC SMT750 UPS devices. They work as advertised. Much cheaper than ordering genuine RBC48 battery packs, although you then have to make a new battery pack with parts from the old one (not a big deal). I deduct 2 stars because on the most recent order, they initially only sent 1 battery, then the 2nd battery took forever to arrive, then the 2nd battery received was a Casil model 1262 (6.2Ah), having less capacity than what I paid for. Somebody in their shipping department isn't getting the job done properly.

You will need to use the existing wiring harness. And you will want to reuse the plastic battery separator/guide thing-a-ma-jig that is stuck on the top/rear of the batteries with double-sided tape. That is just a matter of peeling the connector and resticking it back onto the new batteries. Same thing pertains to the big plastic sheet that is stuck to the front/bottom of the batteries, that is used to pull the batteries out of the enclosure, just peel and re-stick it.

APC UPS that batteries were installed in indicated that they were discharged out of the box. Did take a charge.