12V 30Ah LiFePO4 Lithium Battery, Deep Cycle 12V 30Ah LiFePO4 Battery Built-in 20A BMS, Rechargeable 30Ah 12V Lithium Battery Perfect for Fish Finder, Scooter, Solar System, Camping

Tried several batteries. Used this with a 12V stabilizer and a 48w led light. Lasted 8hrs. Exactly what I needed for the job.

After doing a lot of research for either a 20ah or 30ah 12v Lifepo4 battery I decided to get this one. For the price I paid I think I got a lot of value. I have used this battery extensively and it's doing everything I expected. I hooked up a USB charger to it to charge my phone and other items. I hooked up a 20amp charger to it and it charges up pretty quick. (20 amp charging is a little on the high side and I don't recommend doing this regularly). Most often I have a 100 watt solar panel and a PWM Solar Charge Controller that charges it up nicely (at 5 amps). My primary use is powering a 12v car refrigerator cooler. At normal room temperature this battery will power my cooler for about 30 hours at with the cooler set at 35 degrees fahrenheit. Try doing that with a Jackery or EcoFlow for the same price. I'll wait.

I overdischarged the battery which triggered the BMS. I followed the instructions to reset the BMS but it did not work. Seller sent me a new battery no question asked. I overdischarged the battery again which triggered the battery again. Again, no way to reset the battery. Make sure to have a proper breaker installed.

This is my second XZNY battery. They are both quality batteries, well made and good performance at a great price. The written materials included with the battery are probably the best I've ever seen from any kind of product. I watched a bunch of battery reviews on YouTube and XZNY always did great plus they are very well priced. I recommend them.

tl;dr: It's perfect for my application, and I have zero complaints - it is what it says it is, and does the job.I've been using this with a 53qt portable freezer/refrigerator 12V cooler (like BougeRV if you are curious) - Combined with a 120W solar panel with MPPT charge controller, I'm able to keep the cooler at 10F even when ambient is 100F+ during the day, and 70F+ overnight. I had previously tried a battery from a different vendor and did not have the same luck. I happen to really like the 30Ah size - since it gives me what I need without spending for capacity I'll not use, and to be honest might not be able to charge fully.

The battery arrived on time and in good condition. It weighs 7 lbs. and is intended for emergency/portable power for amateur radio equipment. I use a LiFePo4 4-amp battery charger, which charges the battery to 14.76 volts. After removing it from the charger, the voltage drops to 14.08 volts in 2 hours and 13.44 volts after 72 hours.I used a Computer Battery Analyzer (CBA IV) to record my charging and discharging cycles. Note: that my equipment is not lab-calibrated, but the measurements are consistent within ±0.05 volts of my other digital meters.The pictures show the analyzer and a set of charges indicating voltage drop with varying amperage discharge rates. The largest voltage drop was at a 19.7-amp load. I also recorded repeat discharge cycles with 12-volt and 12.5-volt cutoff voltages, running many cycles of charge and varying discharge rates.For normal operation, I plan to use 12.5 volts as my cutoff voltage, which is about 76% battery discharge. Here are some test results:- 8-amp discharge to 12.5 volts: average 22.896 AH, 291.256 WH, with a recovery voltage of 13.066 volts.- 8-amp discharge to 12 volts: average 28.387 AH, 358.162 WH, with a recovery voltage of 12.730 volts.Example of voltage drop with a 10-amp load:- No load voltage: 13.196 volts- After 10 seconds: 12.874 volts- After 2.4 minutes: 12.779 volts- Initial drop: 0.322 volts- Additional drop at 2.4 minutes: 0.095 volts- Total drop: 0.417 voltsUsing a 4-amp load:- Initial drop: 0.071 volts- Total drop: 0.075 voltsUsing a 19.8-amp load:- Initial drop: 0.732 volts- Total drop: 0.757 voltsTen days after charging, I did an 8-amp discharge with a 12-volt cutoff voltage, resulting in 27.2 Ah and 342 WH.I haven't used the battery in an RF environment yet, so I'm unsure if transmitting will cause the battery's BM module to shut down or if there will be any other issues. If it does, I'll need to provide RF isolation solutions. The battery handle is convenient, but not overly robust. Note: **Do not place the battery upside down**, as inverting it may result in electrolyte leakage.Time will tell if this battery is great. If any problems arise, I'll update this post. I think the battery is good enough that I've already ordered the 20 AH version.

The batteries are awesome so far more range then before. Charge time is faster then before. If the batteries get ran below 50 charge no more harm to the batteries love them so far

The battery was defective and when trying to return it, the seller was providing a hard time returning it. After finally providing a shipping label, I shipped it; provided the tracking number; and FedEx can't find the battery. The seller will not refund the money, until received.