SCREAM POWER LiFePO4 Battery 12V 400Ah Up to 7000 Deep Cycle Lithium Iron Phosphate Battery with BMS for Campers RV Solar Marine Golf Carts Energy Power Supply Emergency,Run in Series or Parallel

This is a double review. Because I purchased 2 L ion batteries from Amazon at the same time.Both were from China.When I first made the purchases. I had second thoughts. Both batteries were about $400 lower in price than any US brand. But China is often slower to deliver.And talking to the seller is sometimes impossible.So, I canceled both batteries. 1 from Fly Power Battery Co. and one from Kepler Industrial.Within minutes both owners contacted me by email and agreed to cancel.That was great, a real live person was easy to reach and talk with.So. I decided to go ahead with both orders. "Boy."O" Boy" was I ever glad I reordered both L ion batteries.Both Batteries are set up now in my Home off grid survival system.When the power goes out, as it just did this Christmas,I use the "system" to power my TV, Modem. computer and my 11 media players.Also, I power my heating pads and electric blankets for extended blackouts.The Great thing about the battery is everything...!Light, easy to move, very important when you are old,More powerful that heavy AGM or Pb acid,Tolerate a high discharge rate,A Very Fast recharging rate.When our Christmas storm power outage happened my inexpensive China L ion batteries never dropped voltage below 13 to 12.9V. The power was out for 3 1/2 hours. They both charged back up to full charge in 30 minutes.Before putting in my 2 100 amp hours new L ion batteries, I had 600 amp hrs of AGM super heavy, slow to recharge, fast to discharge old batteries.It is very important to get a solar charger that has a L ion setting. I found mine on Amazon.One important benefit of my Amazon China l ion batteries is that they arrived FAST.A little over 3 weeks in the USA. Also they come with a great 120v charger that charges the battery nicely.I love em;and the friendly, kind, professional sellers communicate faster than most US sellers.Here are a few picks of my amateur "solar survival system" and the China L ion lovelies installed in my bedroom.

Update 1/9/22Batteries are super stars. Been boondocking for months on these and our Solar with great success. Running 400ah @24v and zero issues. Getting advertised amp hours and running smoothly.Update: 9/26/21Still very happy with these batteries. Traveled through national parks burning tons of amps with these running out air conditioner, PlayStation 5, computers every single night and have been very happy with the performance.Would purchase again.I'm converting a Ford Transit and wanted a really nice off the grid solar system that could realistically run the air conditioner on battery over night in warm climates. I shopped hard. Looked at everything from Bigbattery, SOK, battleborn, Chins etc. I spent a ton of time in DIY solar forum, youtube etc watching reviews and trying to figure out if I wanted to take the chance or not. I knew I could fall back on Amazon or even a charge back if it came to it so I went ahead and took the chance.I ordered 3 200 amp hour 24 volt batteries on 2/13/21 and they arrived well packaged and in new condition at my home on March 16th (early).There was an issue with one of the batteries being the wrong size (Shipping issue). I contacted the seller via email and they quickly rectified the problem and I am 100% satisfied with the outcome and their response. The seller has been easy to get in touch with, my emails have been returned promptly and they have bent over backwards to ensure that I was taken care of and never once asked me to sacrifice anything what so ever.Any company can sell you a product. The real question is will these people take care of you when there is a problem and I can say that I would 100% buy another battery from this company again. End of story. No BS. I spent a lot of money on these batteries and I would gladly buy them again.Ok, now to the performance. I used the included chargers to top off both batteries and ensure they were both fully charged separately. I let the batteries sit for a day after being fully charged and the voltages were identical on both for the duration of the charging and post disconnection. After connecting them to my inverter and wiring everything I ran my air conditioner, 48-52 amps @ 24v until my inverter disconnected the load at a conservative >10% thresh hold.I got 365 aH out of the bank with an ending voltage of 25.01 volts. I spent a lot of money on these and want them to last so I'm limiting charge voltage to 28v and discharge to no more than 90% of capacity. If you do the math you'll see there is plenty of juice left to exceed the 400ah rating on the batteries.Overall I am very pleased with the purchase. If I ever need another Lifepo4 I'll come right back here for it. I'm glad I took a chance on this seller and overseas batteries. I saved a lot of money. Short of getting your own cells and doing your own build these batteries are some of the best $/ah you can find on Amazon.