12V 200Ah LiFePO4 Lithium Battery with 2560Wh Energy Max. 2560W Load Power Built-in 200A BMS And BlueTooth,10 Years Lifetime 8000+ Cycles, Perfect for RV Solar Energy Storage Marine Trolling Motor

This is a great "first" lithium battery and is perfect for the vast majority of applications out there that maybe don't require a truly first class, top of the line unit. If I was outfitting a sailboat to cross oceans, I'd probably bite the bullet and buy more expensive name brand batteries with 24 hour domestic customer service and a great warranty. But I'm not - and this is still a great battery at probably 1/5 the price.It arrived at about a 50% charge level. I put it in my Land Cruiser and hooked it up to the solar system (2 x 100watt panels and an Epever MPPT controller) and it immediately started soaking up the full sun exposure. THERE IS BLUETOOTH WITH THIS BATTERY. They don't mention it. You have to contact customer service to get the app name (it's Xiaoxeng, I think) but once you do all that your phone will tell you exactly how much charge you have along with other diagnostics. In 4 hours of full sun exposure on the panels, the battery was 100% charged at around 102 amp hours. I was frankly amazed at how fast that happened - this is my first Li batt and I realized how fast these suckers can soak up the juice.Anyone interested in this battery needs to watch a Youtube channel called "Clark's Adventure" - he is a sailor and an engineer and was in close consultation with this company during development (he's the reason it's called "Feence" and he'll tell you the story). He does a full disassembly, break down and stress test of this battery (along with a dozen others in other videos) and his findings are really interesting. Basically, this is a mid quality but fully dependable lithium battery that you can depend on for most applications. If you're needing to run a coffee maker and a hair dryer and a microwave, then you'll want maybe 4 of these all chained together, but if you're like most people and just need to run some LED lights and charge a tablet or phone, etc., or run a fridge for several days, then this (or two of these) will admirably serve your needs.Customer service was by email and they responded in about 3 hours. Again, this battery DOES have bluetooth, you just have to work for it.

These have been running daily cycles for a freezer for a year now, and I'll buy more. All specs as advertised. They DO have Bluetooth too. Although the phone app is a bit clunky, it works.

I've got 4 in a 2s2p configuration. They charge and discharge great. I know the cold temp BMS works from real world experience. What I wasn't expecting was how long it would take me to warm up the batteries. it took several hours sitting right next to propane heaters in a 60 degree room for them to go from 26 to 41. I had these wired poorly at first which caused the SOC to be very out of whack. For months. I ran capacity tests on them and they still performed as expected. I rewired correctly with equal distance wiring and going through a bus bar. They are ALWAYS within 1% of each other now. I was apprehensive to use the SUPER Chinese app on my phone but it works and the Bluetooth is invaluable in my opinion.. coming from someone who wasn't even looking for the feature and didn't really even plan on using it.I'm still only at 15 cycles and I may try to sneak two more in. I need to run a mini split somewhat regularly and running a comparable "portable" AC drew these down to 60 percent in 3.5 hours (continually running) so I'm thinking 6 batteries would get me 12 hours which should be plenty once I'm fully insulated. Running a 43" TV, sound bar with surround and sub, lamp, floor lamp, hanging lights, heating blankets, and dometic fridge (my normal "camping" load) will draw down to 83% after 12 hours or so and be fully charged before noon on a sunny day with my 800 watts of panels.They're only 45 pounds. nice carrying handles. bluetooth. 200ah for under $400. What's not to like.Very happy with them for what I paid.

I got my battery 14 months ago and it preforms very well except it never charges to its full capacity (135AH). It only charges to 108AH. I have tried other chargers and different rates of charge but still 108 AH. It works great but wish I had those extra 27AH. I contacted the manufacturer but they never responded.

I have 4 of these batteries, in my experience so far that are a little speedy, but the quality is amazing. Shipping on the first four was insane 80$ a battery. Right now shipping is free, get them while you can!!!!

I hesitated to buy this battery for my trolling motor because of the price. On my Minn Kota the higher amp hour deep cycle batteries don't last a full day on medium to high speeds so I didn't know what to expect with this lower Ah lithium. This battery is amazing and although expensive it is worth the investment. I can fish all day on medium to higher speeds and it barely runs this battery down. Although this is not recommended I ran it hard for two days and then checked it. It still had plenty of juice to spare. My suggestion, recharge this battery with a lithium charger after each use as the manufacturer recommends and you will never have to worry about running out of power on the lake. Learn everything you can about lithium batteries and keep in mind this one is only four cells and its BMS is designed so a full charge is only about 75% of its capacity. It's better to use an amp percentage guage to monitor a lithium battery because there is such a small gap in amperage between full charge and discharged.