2 Pack 12V 10Ah Lithium Ion LiFePO4 Deep Cycle Battery, 2000+ Cycles Rechargeable Battery for Solar/Wind Power, UPS, Scooters, Lighting, Power Wheels, Fish Finder Built-in 10A BMS

Due to frequent pwr outage in S.Cal I was looking for replacement batteries for two UPS units. These APC-brand units are over 10 yrs old but are working like champs. The lead acid batteries have been replaced twice and each last roughly 4-5yrs. Initially I was not sure about the charging compatibility b/w Lead Acid and LiFePO, but after reading other ppl's reviews and internet posts, I ordered two battries and surely enough these two units were put to work and test in realtime. Happy to see at one long outage they lasted twice longer (from 3 hrs to 6 hrs) on a relatively low load of 110-130Watts. The battery is fully charged within 1hrs when power is back. It costed a little more than lead one but for the extra $ it's worth. Beside it's half the weight of lead acid ones, when you get older you will appreciate the weight difference. I used LiFePO in RC-controlled airplanes so I love these powerful but lighter one. Seller is very responsive to my concern and timely addressed my inquiry. Highly recommended.

These are well made Lithium Iron Phosphate batteries that are spot on for the voltage and are a great value due to the built in charge controller. They are easy to install as they perfectly match the size of the lead acid batteries they are replacing. After doing a UPS test we found that are a great battery replacement and deliver even more power than the older lead acid batteries did.

Original battery had issues, however the vendor reached out before I even had a chance to review and asked how things were. When I noted the voltage they immediately took care of things. I will update based on how the battery holds up.

This was purchased to replace my ups and it died in 8 months. Maybe mine is a defect, who knows right Contacted the company for a warranty and they sent me a replacement the next day. Great and trustworthy.

I’d recommend against usage for “legacy” UPS lead acid battery replacement, specifically the common case of quantity 4 or 2 battery systems. These usually are setup with the batteries in series (4x12v = 48v, 2x12v=24v).You are likely better off throwing the legacy lead acid battery UPS away, and buying a lifepo4 based UPS. Even the Lifepo4 portable batteries like the power 1000 have UPS capability. The ups devices that start with a lifepo4 energy source usually have passive and active cooling for the battery array, in addition to the inverter components.There are a few problems with using these in a legacy lead acid battery UPS:1. The continuous output current is far lower than lead acid batteries. The typical Lifepo4 compatible battery option is rated at 10amp continuous. So, in a 4 battery series system, you’ll get at most about 135w continuous output per battery - so about 500watt max. You won’t get anything near the potential needed in common 1000w, 1500w, and 2000w ups.2. The BMS present in the lifepo4 batteries generally needs at least exposed passive cooling, or even active cooling. These are enclosed package batteries, so cooling is limited at best.3. With 4 12v lifepo4 batteries in series, you’d basically need another BMS to manage the 4 batteries, or the discharge and charge levels between batteries becomes imbalanced.4. The charging circuit will not fully charge lifepo4 batteries, in most cases. Lead acid vs. lifepo4 have different max voltage levels.5. The legacy ups doesn’t know the proper estimated runtime or charge level of lifepo4 batteries. This is a relatively minor issue compared to above.Technically, a 48v lifepo4 pack that fits most UPS battery compartments could be built to handle several of the issues above.As an experiment, I fully charged up 4 of these individually outside a UPS, then installed them in the ups. Verified the output of the pack was approx 55.8v. The charge/discharge circuit ”popped” with the telltale electronics burning smell, with smoke, when a 200w load AC power fail test was triggered.These batteries may be ok for some cases, like the single battery backup common to home alarm system panels.

Worked great while it lasted. Had it hooked up to a chicken coop door and 30W solar panel. After about 4 months (just outside support window) it stopped taking a charge from either the solar panel or a battery charger after I hooked it up. Eventually just degraded down to 1V. Maybe I got a dud...***Seller contacted me and offered a full refund which is generous since product is outside return and support window. I’d already replaced the battery but I’d give it another shot especially since they backup their product. I upped to 4 stars based on product support.

Direct fit for kids electric car. Works great, long life.

I got these to replace the Ni Cad lead acid battery in my Neuton EM 4.1 mower. These batteries are 1/3 the weight and easily 1 1/2 times the power. They last 2x as long on a charge. I just took the old battery apart and copied how the batteries were wired, (Take a picture) put back together charged for an hour and cut both front and back yard. Still had power to spare. The mower has more cutting and suction power now. This was an EXCELLENT upgrade.