12V 6Ah LiFePO4 Lithium Battery - Built-in 6A BMS, Energy Storage, 1500-5000 Rechargeable Deep Cycles, Pefect for Solar/Wind Power, Small Backup UPS, Ride on Toys,Lighting, Home Alarm System

I ordered this to replace the SLA battery in my Fishman Loudbox Mini Charge acoustic guitar amplifier. It fit right in there and it's working well. After a full charge I got about 20 hours of continuous run-time via Bluetooth before the battery died. It's so much lighter than the SLA and will last much longer. So very pleased with this purchase!

Full disclosure I returned this battery. I was trying to replace a battery for a UPS that I couldn't find a replacement for. The dimensions and rating seemed good from the listing but I transposed a number in my measurements so it didn't fit. My fault but Amazon allows for these mistakes.I connected this battery to the UPS and it connected and provided power offline so it definitely worked. It was larger but much lighter than the battery it would have replaced. I'd love to replace all my UPS batteries with LiFePO4 batteries since they're so much smaller form factor, lighter, have a huge increase in charge cycles and overall lifetime. Hopefully the market moves UPS tech to new battery tech.

Replace dead lead acid battery in our tiny APC battery backup for wireless router and cable modem. It fit perfectly and has been working great for over a year now and should last much longer with it being lifepo4. A caveat to keep in mind is the max rating of this battery is 78w. so you will need to keep the load below that or the BMS will shut down the output.

Smaller than they looked, will work for my needs

Great company and the cells seem to be of good quality. However the casing on these are not all waterproof which can cause premature failure. If you're going to use them outdoors I'd put a bead of silicone around the seam and maybe even a dab at the base of the connections. The one I had that seems to be sealed properly has been through many cycles without issue with a 6v-12v pump so the low voltage cut-off seems to work great in my experience. They are extremely light and at 6ah they can be used in a variety of off grid/solar applications. The 6ah is true to cell at least when I cracked open a bad one.

Just like another reviewer stated. Doesn't last! My battery made it 17 months. As they also stated, it just stopped working out of the blue. There was no indication that it was slowly dying, it just quit working all together. Where they get you at is their warranty. They know you will not pay to ship the battery back to China because the shipping back to China will be more than the battery cost itself. I can only speak for the 6ah battery from this company. Other batteries could be fine, but the 6ah battery.......Doesn't last as their description states.

Great rechargeable battery for 12 volt dc led lightsBuilt a lightweight flashlight with my grandchildBattery is lightweight and last a long time between charges

Bought this for my nieces 12v Jeep power wheels and it works well. It’s is really light and fits just fine in the car. Good bang for buck especially since she doesn’t always ride it and when she’s done it’s really easy to remove the battery and charge it inside faster than the built in charger.