Power Queen 12.8V 50Ah LiFePO4 Battery Upgrade, Grade A Lithium Battery Cells with 50A BMS, Up to 15000 Cycles, Portable & Lightweight for Trolling Motor, Boat, Scooter, Wheelchair

I bought 2 of these batteries and tied them parallel for the RV 12v power supply. Being new to how lithium batteries work, I sort of treated them like the lead acid batteries in the beginning. I've had great help from the seller and finally understood how they work. Today I did a test with them to see how well they would power up the full size residential refrigerator from warm start in the RV. The inside temperature started with 78 deg. The batteries were 13.3v and 100% power. I turned on the inverter and started the cooling process. 1.5 hours later the inside temperature was 35 deg, the batteries were still 90% power and 89AH left on them at 13.1v. I also purchased the Power Queen battery monitor to watch the conditions of the battery, very helpful device to see what's going on with the batteries, charging and discharging.

I was skeptical buying the cheapest LiFePO4 on amazon.Story time:I had the battery for about two months before installed it in my 21' toy hauler and immediately went camping. First night no issue. Second night the battery cut off power completely. I was bummed.The next morning, I unhook the battery for 30+ minutes as instructed in the manual and it came back to life. It charged off my solar all day, but this is winter and the panels were not clean nor in optimal sun. I saw 175 watts of peak charge for probably 1.5 hours. I didn't think much of it.Third night, the battery cut off again, be it a little later in the evening. I was pretty upset with myself for never learning my lesson about being cheap. And not realizing we don't have real camping gear like flash lights because the trailer always works and has power... Well previously it did with two deep cycle 6v in series for "200ah" of which you are only supposed to discharge to 50%. Those batteries don't just shut off at 50%... they will let you drain as far as you want.Needless to say I was wondering how to get away from this battery and back to buying lead acid every 3 years.After sending an email to power queen support and getting a response within 24 hours (on the weekend), they told me they thought the battery was under charged. I emailed back and said I don't think so. That is was showing 13.3v after the all day solar charge. They wanted be to charge it using a dedicated LiFePO4 charger and even offered to send me one to borrow. I purchased Ardroit 14.6V 30A LifePO4 Battery Charger from here on amazon and promptly charged the battery overnight.After using the charger, I again saw 13.35 volts on my "AiLi Voltmeter Ammeter" battery monitor. I reset the battery monitor for 200ah and 100% charge. I was ready to prove Selena and Power Queen wrong and get my money back ( as the offered) if the battery did not meet 200ah.I turned on various loads in the trailer. Had three heating pads (12a total) going for a while. Turned on all the lights, though LED so not a ton of current. Bathroom fan, switched the fridge on, etc. I wanted to test it as I would used it camping and maybe a little more. I shut my solar off and left for work with a load that would vary from 4-14 amps depending on what was turning on and off.In total I tested the battery for 36 hours without charging it. I tested like I would use it.I was wrong about this battery under performing. The battery monitor showed that at least 200ah worth of energy had passed thought the shunt. This battery well outperformed my lead acids. I was shocked about the responsiveness and help from the customer service Queen Selena. Noe seriously, very helpful and nice... not condescending, like the basically non existent customer service found at any other company I recall in the last 10 years.I didn't realize how high the battery voltage stays on this battery throughout usage. At only 32% battery life left on the monitor, this battery still had 13.03v. The high voltage I saw out camping after the solar charge was probably just a "surface charge". There is no way my 450w solar setup, in under preforming conditions, fully recharged the battery.I'm tell you all this, incase you find your self testing this battery for the first time out camping... and you start to question the sanity of your purchase.I suggest either purchasing a dedicated LiFePO4 charger, or let your solar, charge the battery for a week (depending on conditions) before you are relying on it 100%. Get a battery monitory. The cheap one I mentioned above is great... you don't need a $200 victron bla bla bla. Relying on only voltage to tell state of charge, may get you in trouble as it did me.Now that I have schooled myself the hard way... I love this battery.I cannot yet speak for longevity of this product, but they state a 5 year warranty. If this company is around in 5 years, they will honor it judging by how they handled me. I suspect they will be around as more people take the chance on this "no name" battery and are pleasantly surprised by it. I recommend this battery and this company.

This came in very quickly, with the seller messaging me when it shipped out giving a tracking number also. The battery seems like a very good build. Light weight so easy to move around. Bought this for hurricane seasons. Owning a battery charger, and power converter it allows me to be able to power a fan, some lights, a small tv and modem for several hours if needed. Handy to have for simple short term power outages. Thinking of getting more (when on sale again) and building an electric generator to be able to power more and larger items for longer times for my parents who live out in the country, when they have a power outage its possibly for a day or two for them.

I ordered two batteries and they arrived earlier than anticipated. Out of the box, the starting voltage was about 3.2 volts per battery. Initially I had an issue getting my charger to recognize the batteries and begin charging despite the charger supposedly having a minimal starting voltage of 2v. I had to hook up a solar panel to bring the voltage up a bit and the charger worked no problem. You may have to use a manual charger for a bit if you don’t have a solar panel. I purchased these batteries to run a 24v Clarke auto scrubber. I picked this battery in particular because of the 500amp max starting voltage. Once I wired the batteries up in series to get up to 24 volts per battery I used my scrubber to clean 10,000sqft and it was a flawless experience. The batteries performed perfectly and were actually a bit smaller than the four 6v lead acid batteries they replaced and weighed a fraction of them too. Another bonus was that the voltage remained constant (above 13v per battery) and did not fade in power output like traditional led acid batteries tend to do. By the end of the cleaning, battery temp was relatively cool, around 82 degrees Fahrenheit. Another great feature is the Bluetooth capability. It allows you to monitor each battery in real time for pretty much every thing you need to know while under load: voltage, amperage, watts, temperature, remaining amp hours and estimated time remaining. It does the opposite when charging and gives you an estimated time to when the batteries will be charged - fantastic. Another perk is never having to worry about adding water ever again. In fact, you don’t have any of the concerns with these Power Queen batteries that you do with lead acid batteries since they are lithium iron phosphate. My last point comes to the value you get for your money: these cost less than buying four 6v lead acid batteries and will last thousands of cycles(supposedly 6,000) vs lead acid’s hundreds. You will occasionally need to charge each battery individually to make sure they are both equalized. Even if these batteries only last me 4 years, it’s still a win in my opinion. They cost less, there’s less maintenance, more performance, no acid leaking and are very easy to maneuver in the event I need to use them with an inverter.