12V 10Ah Lithium Li FePO4 B attery with Built-in 10A BMS Board | 5000+ Deep Cycles, Higher Energy Density, for RVs, Van, Camping, Marine, Trolling Motor

Works great for my hummingbird helix fishfinder, very light compared to regular batterys

This was purchased for use in an old Vector PoB HID handheld search lantern that took the standard 12V 7AH gel cell batteries. It fit perfectly, same dimensions as those old batteries but is much lighter and with more capacity. The built in BMS allows us to continue using the original charger that came with the lantern. We have tested the unit and while we have not run it down, it is clear that it will run a fair amount longer than the old gel cell could do.

I DO NOT use this as a constant source of 12v power for anything, so I CANNOT attest to the "longevity" of this battery or the overall "life" of the battery for daily use. I got this primarily to "open" fuel injectors to clean them out without using my car battery and other small projects around the house I need a "temporary" 12v power source for. (I like that it is very SMALL and LIGHT (for a 12v power source!) so I can just put it on a shelf in my garage until the next time I need it!) It worked well to open my fuel injectors so I could a clogged one and then stored the battery. I have a "charger/tester" that FITS this battery and after using this for that ONE project I have not needed to use the battery since. However, I DID hook up the battery to the "tester" and it still showed "full power" several weeks later for what that is worth. Considering that I do not use this for a constant power source or in a "daily use" item, I cannot attest to the longevity or the "starting power" of this battery for use in that manner. However, for the purpose that I USE IT FOR, an easily stored 12v battery source it has worked well for me for that purpose. At the time of review, it is currently "on sale" for under $30 which is definitely on the "low end" for a small compact Li FePO4 battery. IT has worked for me as a "handy" 12v project power source for "projects", I however cannot attest to its durability or longevity for "constant use" due to the way I used and use this product.

I used it to power my Bluetooth speaker on my side by side

Completely DOA.... returned and 2nd one is completely dead! Waste of time driving these things to the UPS store for return! Both cases used in a UPS would only keep a 60W bulb light for 10 seconds after full change. Tried with 2 A 25 watt 12 v fan... ran for 30 seconds!! Something is horribly wrong with these batteries!!

One battery worked well but the other battery I ordered was completely dead with 0V in it so I would check the voltage before installing it

Works very well, lasts for a long duration.

I got this battery to use in my security system for a battery backup. The battery has a slightly higher capacity than the failed battery that I replaced, but the voltage is the same so it functions just the same but it should last longer in the event of a power outage. Fortunately, I did not have to worry about the battery fitting because the security system is in a very large enclosure and there was plenty of room.