12V 9Ah Lithium LiFePO4 Deep Cycle Battery, 3000+ Cycle Rechargeable Lithium Iron Phosphate Battery for Solar, Fish Finder, Lighting, Off-Grid Applications with 10A BMS

Of these batteries for replacement in APC UPS units ES-550 as I have gotten tired of replacing lead acid ones. The 1st was the 10AH unit in 2/24 and now I have gotten a 9AH in 12/24 for a different unit. So far, no problems and seem to work as well for my needs as the lead acid ones. Certainly, they are much lighter and easier to work with. The fit perfectly with the polarity and connector size being exactly the same. One can only wait to see how long they will last before needing replacement. I hope for a pretty long time.

Only lasted 5 months in a power back up from APC

Couldn't ask for a better replacement battery for my Marcum LX5 fits perfect and super light compared to a lead acid battery

Review: 12V 9Ah Lithium LiFePO4 Deep Cycle Battery, 3000+ Cycle Rechargeable Lithium Iron Phosphate Battery for Solar, Fish Finder, Lighting, Off-Grid Applications with 10A BMS Rating: 5/5 Stars Pros: High Quality and Reliability: This 12V 9Ah Lithium LiFePO4 battery is a top-notch product that delivers on its promises. It's built to last, and the 3000+ cycle life is a testament to its durability and reliability. Versatile Applications: Whether you're using it for solar power systems, fish finders, lighting, or off-grid applications, this battery fits seamlessly into a variety of setups. Its 10A BMS (Battery Management System) ensures that it's safe and efficient, even under demanding conditions. Low Maintenance: Unlike traditional lead-acid batteries, this LiFePO4 battery requires minimal maintenance. It's also lighter and more compact, making it easy to install and transport. Consistent Performance: The battery provides a stable and consistent power output, which is crucial for devices that require reliable energy. I've noticed no significant drop in performance over time, even after multiple charge cycles. Cons: Price Point: Charging Time: It takes a bit longer to charge fully compared to some other lithium batteries, but this is a minor trade-off given its overall benefits. Conclusion: I recently purchased this 12V 9Ah Lithium LiFePO4 battery from the BOTKU Store, and I am thoroughly impressed. The battery works exactly as advertised, and its performance is outstanding. It's a reliable and efficient power source that has significantly improved my off-grid setup. The 10A BMS ensures that the battery remains safe and functional, even when used in challenging environments. The only drawbacks are the higher initial cost and slightly longer charging time. However, these are minor issues considering the battery's long lifespan and consistent performance. If you're in the market for a high-quality, deep cycle lithium battery, I highly recommend this one. I would definitely buy another one of these batteries any day.

I've been converting all my old SLA batteries where possible this past year over to LifePO4. When the time came to replace another one I thought it was time to try a different one for one of my UPS units. The reason being is that with all the LifePO4 batteries I've bought some come in as much as 20% under spec and some I've seen over 10% above spec. So I keep looking for that unicorn that's 25% over spec at a great price and I've got my new go to. So with that out of the way it was time for me to charge this up and do a capacity test. As mentioned I've owned a few of these style LifePO4 batteries and more than not usually exaggerate the capacity some. Well I charged this one up, let it rest a whole day and did a load test on it pulling a constant 9 amps, down to 10.9v. The battery came in around my expectations given the 9A load as it pulled in 104.4Wh that's right at 90% of the advertised capacity. I'm sure if I ran it again only using a 1 or 2 amp load it would probably pull a wee bit more. Coming in at 90% doesn't surprise me as I mentioned above my experience is these are rated either in a lab or via dartboard. What concerned me some was of the 7 or so LFP batteries in this form factor I've ordered from Amazon, this is the ONLY ONE that's ever gotten hot during my load test. A 9Ah load should not have been super stressful for the battery. It also causes me to very much 2nd guess what the label on the battery says. That label indicates it can handle 10A charging and 20A continuous discharge. So what does the manual say? Well this model isn't in the included manual, in fact the specs on the side don't slot in anywhere nicely in the manual. So IDK if this is some new performance line or what.