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'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.

My aging Celestron power tank used to drive my night-time 'scopes was flagging. Too much extended use maybe, maybe casual maintenance, but all the same the old tank was now a puddle. Pros: LiFePo4 batts run until they collapse, providing juice well beyond the 50% lead-acid batts. This was a direct replacement size-wise, with a 30% boost in sustained amps. Make sure you measure the bay intending to receive this new batt. LiFePo4 batts provide up to 80% energy, but then they quit suddenly. LifePo4 batts charge rapidly, and far more often than their lead-acid counterparts. This batt is considerably LIGHTER in weight making it easier to cart around in the dark. Note: LiFePo4 batts require a compatible charger, I use this from Amazon: I have several of these Mroinge LifePo4/Lead acid 2A chargeing and love 'em as they work for nearly any batt: https://www.amazon.com/gp/product/B07MCTXFC7/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1 Cons: They are pricey, but taken in the long haul are a better value for service and overall lifetime. So for my night-time astronomy habits that extend into the wee hours, this was a great upgrade.

Although this battery is packaged in convenient standard sizes of a SLA batteries, it is not suited for many tasks a SLA battery performs. DO NOT use this battery in Uninterruptible Power Supplies, emergency lighting or alarm panels as they all do not have the charging methodology a LifePO4 battery needs. This battery is good for Razor scooter and power wheels where you can order an appropriate external Lithium Charger to plug in to your toy. Also note this battery does not have high current delivery. The BMS shuts off the battery if you draw more than 11 amps from the 10AH version. Even if you can attach an appropriate charger, it cannot handle the higher current demand of a UPS. I recommend this battery for CUSTOM applications where an Electronics Engineer can properly asses electrical loads, duration and charging technology. You could use this as a trolling motor battery, but again, Jerry rig (That is Jerry with a PhD) a LifePo4 charger.

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.