Bests & Worsts Reviews from Amazon

These are my first experience with Lithium Batteries. I'm using four of them to power my 2000watt inverter for the solar outfit I have put in my Grand Design 5th-wheel RV. I'm still amazed at how different Lithium batteries are from lead acid. At 71, the 75 pound lead-acids have become a problem to move about. These batteries are less than 25 pounds. I've tested all the devices in the RV except the AC's (don't intend to use them with the inverter), and when pumping out over 150 DC Amps I'm yet to go below 13 volts on my battery monitor. The price is certainly right, too. I'm not sure why people pay 400 dollars more for the others; I did notice that these are warrantied for 5 years, and perhaps its the number of charge cycles they're rated for that make the others so expensive. I believe these are rated for 4000-6000 charge cycles from empty to full. They have an expected lifetime of 10 years. With four of them (400 amp hours), I doubt they'll ever go much below 50% SOC unless I do a lot of microwaving and run the refrigerator from them instead of propane. Anyway, I am very pleased with what I've seen so far. Being new to Lithium and trying to figure out the settings on my Victron BMV 712, I emailed customer service with questions about five times. As regular as the clock, I had an answer promptly the next day every time. I suppose time will tell as I put them to work, but after a week of testing, I am very pleased. The only complaint I might make is that the bolt that comes with the battery is very short, half-inch I think. I wish it was a quarter inch longer which would make connecting two, 2/0-guage lugs to put the batteries in parallel a bit easier.