12V 30Ah Lithium LiFePO4 Deep Cycle Battery, 3000+ Cycle Rechargeable Lithium Iron Phosphate Battery for Solar, Fish Finder, Marine, Outdoor Camping, Off-Grid Applications with 30A BMS

After two years they have been reliable I must say. Then my gf serve me some hot fresh cheeks for me hard work!

I have purchased 4 of these at different times for powering homemade boomboxes. They deliver excellent power and run a long time for the application I’m using them in. Most of these builds have been in a rolling case about carry on sized with 400-500 watt amplifiers in them. Highly recommend!

Great batteries. Use them in my handicap scooter and they last all day, maybe two days.

Just a warning. The 30Ah batteries that I bought (and it looks like the 20Ah ones are the same height in the description) batteries are just SLIGHTLY taller than a 12v 17Ah SLA battery. The description shows that now, but I'm 90% sure I checked before I ordered them and it showed the same exact size size as a 12v 17Ah SLA battery. I could have just looked at too many batteries and made that mistake on my own so I'm not saying the description was changed, but I want to point it out for anyone reading this and thinking of buying these. It's not an issue if you're aware of it and plan for it. If you put two of these into an old APC SU1400 UPS, you're going to have to bend the tabs inside the UPS. I have them in there right now. I have no idea if I can ever get these batteries back out. Also note that if you decide to try these in an old APC UPS, the battery terminals are different (obviously) and the fuse that came with the UPS won't fit standing up. It hits the circuit board in the back. Also, if you buy automotive "bolt-on" fuses that LOOK like they'll fit, they are too short as the fuse is 1.61" in overall length, not between the center of the holes. That's exactly what all the descriptions for the fuses show, I was just "hoping" it'd fit. I just "trimmed" the fuse with wire cutters, but that's a hack and would most likely overhead if used anywhere near the fuse rating. I bought an 80A fuse instead of the 100A that came with the UPS, , due to the battery rating,but I bet the batteries would shut down before that was needed (I hope). With full load on my UPS and reading the current between the batteries (where the fuse would go) I read just over 8 amps, so I don't expect to draw too much current for these batteries. I have no idea if the UPS will draw the batteries down too far to not come back up without applying outside voltage to them, but I'm hoping the UPS will shut down and stop drawing anything from them before that happens. We'll see. Note that the batteries say 40A continuous draw and 80A for 3 seconds, but the "user manual" that came with them says 30A continuous draw with 60A for 3 seconds. I have no idea which is correct and I didn't test it. It doesn't matter for my application, but just something to be aware of. Oh, also note that MANY people online say not to put LFP batteries in a UPS looking for SLA batteries, so do that at your own risk. These will never be 100% charged by the UPS and that's fine with me. I'm planning on longer run time (I haven't test it yet to see how long I get) and the most important thing is not to have to replace the batteries every 2-5 years. SLAs always seem to die when you need them and I have hope these LFPs won't. Even if they do die in a few years, they were only about $20 more than a replacement set of SLAs for me.

Great Value