FLLYROWER Lithium Battery 12V 12AH With 17000 Deep Cycles and BMS Lifepo4 Battery Grade A Cells for Marine Trolling Motor RV camping Solar Golf Cart Off-Grid

Haven't had the battery very long, but it works great. It holds the charge for a long time and does the job.

Bought two, neither will take a full charge. Using them for trail cameras. Taken very few pictures and they both died in a very short time. Tried to charge a second time and neither will charge more then 12.1 volts. Cx support is totally non existent. DO NOT WASTE YOUR MONEY!!!!!

It wasn't but a few (VERY few) short years ago that a 12v 12AH LiFePO4 battery would run you DOUBLE what this costs. Luckily, the prices for this particular battery tech has really come down in the last few years, to making them very viable for many projects and purposes.This arrived somewhere around a 50% state of charge (even measuring the voltage you can't be exactly sure where you start at). According to the manual, maximum charge rate for this is 15 Amps, with a recommended charge rate of 7 amps.When a battery is new, I like to take it easy for the first few charge/discharge cycles. So I set my charger to LiFePO4 mode with a 3.5 Ah charge rate (half the recommended, 1/4 the max). I'd like to tell you what the exact charge time was at that charge rate, but unfortunately the battery over-voltage protection kicked in before my charger's peak-detection circuitry shut the charger down, which on my charger wipes the "charge time" from the display. Needless to say, it took somewhere between 1-3 hours at a 3.5 Ah charge rate to fill her up.And, in fact, that's probably a good thing. Usually when I charge my LiFePO4 batteries, my charger trips first so, you never really know if the BMS (Battery Management Circuitry) is actually functioning properly until a disaster happens and you find it isn't, lol. With this battery, the over-voltage protection (which is a key function of the BMS) was DEFINITELY functional, so ^5 for having a working BMS.Of course the end test of these batteries won't be realized until after many months or even years of service. So I can't tell you if it'll still be holding the electrons 5 years from now. But right now, it functions perfectly, even better than expected actually, so, 5 of 5 stars, and a 5 of 5 stars for the cost / capacity, as well, as this is a fantastic value.

I am trying out several of the new LiFePo4 batteries for Ham Radio use.This battery charges well and holds it's charge. I topped it up and set it aside for 45 days. No appreciable loss of charge. It works well with my 75W 2Meter rig at home.It also seems to parallel well with other 12AHr batteries in my battery box. It seems to stay balanced.I found a 14.4V 6A charger on Amazon which seems to work well with the built-in BMS. This is similar to several other 12-15AHr batteries which I have tested.I cannot confirm short circuit protection without a full-up battery tester, nor can I confirm the Watt-hour rating. Or cut-off voltage. There are several reviews on YouTube, including a teardown, which discuss these. It tests well for their technical tests.I am happy with the battery so far!73!

These batteries are garbage. Do not buy. They will either stop charging or not work under a load rather quickly. Just using to power a kids ride on car, but they just can't handle even the smallest of loads. Had to return. They are cheap because they are made with cheap components. Do not buy.

This battery contains an internal BMS to protect the cells against high and low voltage conditions, and likely to help balance the cells as they age.LiFePO4 cells should charge up to 3.6V/cell. This battery is set up in a 4S configuration, so that should mean the battery charges up to 14.4V, but once the charging is done, it should "settle down" to 3.4V/cell, or 13.6V for the whole battery.The BMS inside this battery abruptly disconnects the cells during charging when the battery reaches 13.6V, prematurely ending the charge cycle on my LiFe charger, and likely means the battery cells are likely getting charged a little bit less than 100% full.Once fully charged, I used a dedicated LiPo discharger to discharge the battery down to 3V/cell (12V overall) using a 5 amp draw, which is a test to drain the battery down to 10% remaining capacity.The test result showed the battery discharged 10.793Ah / 138.3Wh. Since this test only drained 90% of the power, if we adjust the results by adding 10%, that shows the battery having a capacity of 11.87Ah / 152.13Wh, which is AMAZINGLY close to the rating stamped on the battery--only 1% off, and I typically consider a "good" battery as one that can test within 10% of its rated capacity.So, I would call this battery "superb" at being able to deliver on its promised capacity, and could not be more pleased with these results.