ExpertPower 2 Pack 12V 10Ah Lithium LiFePO4 Deep Cycle Rechargeable Battery | 2500-7000 Life Cycles & 10-Year Lifetime | Built-in BMS

This battery installed OK into a CyberPower 1500VA PCS Sinewave UPS. But when a small power blip occurred; all my lead acid UPS systems had no problem but the CyberPower 1500 shut off. I think this was because the UPS thought the battery was charged and even indicated with a 300W load that it had 32 minutes run time. But it was wrong. The load was shut off and the UPS shut itself off. I'm not disparaging either this battery or this UPS. Just, they don't work together most likely because an SLA charger will not charge this battery. See the answer to the first question for more detail.

I bought 2 of these batteries to build a back up power supply for two applications. The first was to run my small QRP ham station in a box that was intended for use during hurricane season here in Florida and the second was to power my cable modem when the power went out (happens a lot here in Florida). The batteries, installed in a plastic box, (purchased from Amazon) worked excellent for either purpose. However, one day, they simply stopped working. (zero output) While unsure of the actual failure I suspected I had shorted them our during charging and felt sure I now owned two bricks. I sent a note to the company and during a long series of exchanges i found that the built in BMS likely went into a safety mode and if I put a small charge at 14.4 VDC i might recover them. Sure enough the Batteries came back to life and they work perfect. I sure never expected that .... I asked for and received the specifications for the BMS. After reading the specs and further discussions with their tech in California I found there were numerous protections built in and the price for the batteries is very justified. Definitely would recommend them.

Received the product fine. Packaging and shipping was fine. Product was seemingly undamaged. I checked that it was fully charged (it was) and connected it where I needed it. It seemed to go flat very quickly, so I went to charge it. The battery was not able to take a charge. It looks like I got a dud. No big deal - sometimes that happens. I tried to reach out to the company - there was no way to do so. I contacted Amazon to request a return, and I have to ship the product back at my expense. To those looking for this type of product just be aware that you might want to look for another supplier - otherwise you could find yourself well out of pocket for a product that doesn't work through no fault of your own.

I've used this product for two years with no loss of duration of charge. Operates above 13v for 95% of duty cycle. I did, however, purchase the recommended charger, as standard chargers have too low a voltage to maintain this battery properly.

Slightly below rated capacity (2.5% less at 125 Wh). Charged using CC/CV up to 14.4V, no more than 2A during CC, and at the end of charging it was drawing just a few mA as expected. Let sit for a day. Resting OC voltage was 13.85V. Ran test at 0.15C rate using an Ohmite shunt and voltage measured at the battery terminals (not at the load!). Stopped when voltage dropped to 10V. 125Ah result. Can't complain too much about that, but most batteries I buy these days test at slightly over the rated capacity.