12V 8Ah Lifepo4 Lithium Deep Cycle Battery 2 Pack, 2000+ Cycle Rechargeable Battery for Small Solar, Power Wheels, Lighting, Fish Finder, Off-Grid Applications with Built-in 10A BMS

Works fine in older Razor 24v 12" dirt bike, maybe a bit more power than original AGM. Wasn't sure if BMS would be powerful enough, but it hauled my 180lb body up a steep driveway, the motor struggled as it usually does, but the batteries didn't cut out. Also wasn't sure the original 24v charger would work, but it does. I do assume that one battery will reach 100% before the other and will cut out, leaving the other battery not fully charged, so I will periodically charge each separately. The weight difference is incredible. And hopefully won't be replacing these every other year like the original AGMs. I will likely be purchasing more for UPS's, to eliminate replacing AGM batteries! Testing the BMS while charging, I think they will work fine with a UPS, as they completely cut offline when fully charged. Not sure how much current they can actually output for a UPS though.

The batteries in my UPS devices go about every 4 yrs or so. I use LiFePO4 batteries so I tried these. They have been working great for the last 7 months. They hold the charge and last longer when the grid goes down, I expect them to last at least 10 yrs before they have to be replaced. They work great, long life makes them cheaper buy in the long run, Them output a lot more power than a lead acid battery. This is a smart buy. I will start replacing all my UPS batteries with these. Highly recommended. UPDATE: Well it's 11 months later and these two batteries are still in my 1500w UPS on my wife's computer system. No complains. They work real well and I am in the process of replacing the old SLA batteries in two of my other UPS's, the SLA's in them are two yrs old and failed when the grid when down this morning.

Replaced several APC UPS batteries. Backup and Smart Back up need to reset battery replacement date and run calibration on new batteries using APC software. UPS display will then show correct time to failure without killing the BMS. Difference between SLA and Lion is that the BMS cuts off the battery and the UPS will not charge because it does not see a battery. SLA voltage drops slowly whereas Lion drops suddenly. If this happens (BMS low voltage cutoff) then you have to "jump start" the battery by putting voltage on it so the BMS turns back on. Once this is done it will work normally until the BMS cuts off. So don't run the battery down until it fails. This is the major difference between SLA and Lion.

Nice and light. A great replacement for sealed lead batteries. The size is a perfect, or near enough perfect match to fit in a Cyberpower UPS, so I have zero complaints.

I bit the bullet and tried these premium batteries for my portable Bluetooth speakers. Perfect exact fit for replacement. They're really light with plenty of power and duration of battery charge cycle. Definitely worth the extra money!

Great item thank you

I was tired of having to replace my UPS batteries every three years. I had seen another post about this battery working as a UPS replacement. I can verify it works great on an APC Back-UPS RS 1500 LCD. The LCD will not display the correct information about the battery, but it will charge the batteries and I get more than 2x life running on the batteries over the original Lead Acid batteries.

January 13, 2014: The product rating has been upgraded to four stars. The seller successfully resolved the defective battery issue, demonstrating commendable product support. January 9, 2025: Downgraded to one star. This is the third time I have purchased these batteries as SLA battery replacements for a UPS system. The UPS consistently displays an error code indicating a charging failure. Testing with an external charger yielded identical results. The UPS and external charger functionality has been verified using the original SLA batteries. Battery voltage testing reveals a reading of only two volts. Amazon has declined a return due to the lithium-ion battery type. I anticipate a response from the seller to facilitate a resolution and will update review if resolved.. Upgraded to 4 stars. The vendor stands behind their product. Customer service is outstanding. They contacted us within 4 days and refunded the purchase cost of the batteries that were not performing to specifications. Purchased these in the past and of 12 two were NG. Purchases replacements and again two were of the NG. Guess it's a crap shoot with these batteries. Can't return because they are Li based batteries. Will not charge in APC UPS SMX1500. Uaed outboard charger and tested batteries after12 hours on charger. Meter shows max. charge 8.5v. Guess I will have to recyle them and I am out the funds.