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

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. Update - I can't say enough good things about these batteries so far. I don't know how much is the charge controller and how much is the batteries but the 2s2p is running LOCKSTEP together. all batteries are showing 13.28 volts and 93 percent. this is without a balancer wired in. The Bluetooth is even a little more in depth than some new batteries I just purchased (it shows remaining AH). They're great ALSO. Try the Overkill Solar app. It will connect to these and it's a bit less buggy, imo, than the xixiang app or whatever it's called and much less Chinese.

I bought this to use as an expansion battery for a Bluetti power station. The battery itself is very nicely constructed, with a heavy duty case with carrying handles. The BMS app is very basic but it seems to be spot on with a Victron smart shunt that I installed for my project. For the money, this seems to be a homerun. It has cold temp charge protection along with a working app, plus a solid external build with epoxy set battery posts. Maybe a set of safety caps included would be a nice addition and also individual cell voltages in the app. I charged it to 100% and then used a 12v fridge to run it down to 80%, that took over 48 hours lol!

This is a great price. It is comparable to simular batteries costing more. The Bluetooth is convenient and it is sooo light. The other one I had before weighed around 90lbs. This one is under 5lbs for the same rating. I use this for my hydraulic press in my shop. But I also take it with me camping. It's a good buy.

Battery cells were imbalanced and Cell 4 would trip the BMS Cell over-voltage during 14.6V absorption. The solution if your battery strangely disconnects before charging completes is to download the app called “XiaoXiang BMS” from your app store and buy the premium features so that you can re-program your BMS. Set your balancer config to Start at 3350 mV with a Delta of 5 mV. Make sure Balancer Enabled and Balance only when charging is enabled. Don’t forget to write your settings to the BMS. You may have to reduce your absorption voltage to 14.0V and reduce your charge current to get the cells to balance without tripping the cell over-voltage. The BMS’s passive balancer is easily overwhelmed by fast chargers. Eventually they will balance after several cycles and you can use it normally. If you want your LiFePO battery to last, it is important to use a programmable charger: Bulk to 14.0V (14.6V if your cells are balanced) Absorption - 2hr limit, tail current (Total Bank AH/100) Amps Float - 13.4 V

Ok shipping, easy app setup works ok, so far capacity testing I've done shows all cells are very good! Will buy again. March 2 update, loving this battery, will be buying another just wish I didn't have to give so much personal info just to control the app.

I purchased 2 batteries for my 5th wheel rv, upgraded solar and controller. Batteries worked well for about 90days and started having trouble. One battery is great, the other doesn’t take a charge. Purchased a separate lithium charger per customer service, downloaded messaging apps, contacted them several times with no success. Now I’m over my warranty with a bad battery. Unless they want to make this right and replace my battery I will not purchase again from this seller.

Purchased because it has low temperature disconnect and is Bluetooth capable and was the best priced battery during Prime Days but was not a featured product. I have tested the amp hours and it exceeded its advertised capabilities. It is advertised at 200 amp hours but is measuring 204 amp hours which is a pleasant surprise. It accepts a fast charge. The only negative I can say about this battery are the accessories. There was only one set of bolts included and they don’t have plastic safety caps. I can see using this battery for years to come and highly recommend purchasing!

Compre 3 para un inversor de 36 Voltios... funcionan muy bien y su aplicacion incluida muy util para checar estado y carga (%) de las baterias.. las recomiendo y a muy buen precio...