12V 300Ah（280Ah） LiFePO4 Lithium Battery Mini Size, Built-in 200A BMS, EVE A+ Rated Cells, Low Temperature Protection, 15,000+ Cycles, Ideal for RVs, Solar Energy Storage (280Ah Mini Size)

The media could not be loaded. Edit! Still very impressed with these batteries and great value! I've now had them for exactly 2 months. I've installed all 3 into our off grid camper and we have used them for powering everything from a microwave, air conditioner, shop vac, 12 inch miter saw, 12 cup coffee maker, hair dryer. They've produced so much more power than my previous lithium-ion batteries! Last month I even got a 100ah trolling motor battery with Bluetooth from them for my son for truck camping and it too is working great!VERY IMPRESSED so far! I ordered 2 of the NEW 300 amp hour MINI lithium batteries off the WattCycle website and another 1 off of Amazon. They all 3 have arrived in under 1 week and they are working perfectly. I ordered them Thursday amd Friday October 17th, 2024 and received them all by October 24, 2024 in perfect working order. I started off by testing 1 quickly then placing it in a freezer set to 26 degrees Fahrenheit to test the low temperature charging protection, left it in for about 12 hours and hooked to a charger and it would not allow a charge to pass! I allowed it to warm up slowing and then tested again and it then would allow charging again. Very happy to see this feature working! Being able to use my system in freezing conditions is very important to me and this helps to know my investment in these batteries will be protected!The second battery I began charging up off my 1000 watts of solar panels and Victron charge controllers I have in/on my fully converted cargo trailer camper. I use it as an "off-grid baby camper" as I call it. We use the camper (I built in spring 2020) for family trips, camp outs, cross country road trips, and "deer camp" where we expect it to deliver all the comforts of home in a small package while going wherever we want. We depend on the solar and lithium batteries along with chargers and inverter to keep the food in the fridge cold, my family and pets cool in the air conditioning in the heat of summertime, electric heaters and diesel heaters keeping us warm in the winter. Along with being able to run a coffee maker in the morning or making microwave popcorn for watching a movie on the TV before bed.... all while being able to camp anywhere we want without the concern of pluging in at a campsite or having to listen to a noisy and stinky generator. So far the available power in these batteries compared to my previous lithium battery bank I can instantly tell these batteries will be a major upgrade to my system.My previous system consisted of 465 amp hours of lithium-ion in 3 parallel batteries. Connected in my system with a 12v Giandel 2200/4000 watt inverter it powered all our needs but I noticed a slight delay in developing power on some higher demanding appliances. With my limited time with these new Wattcycle 300ah Mini's, I've so far hooked up some power tools in my garage and a microwave in my trailer and they all have preformed like they were plugged into a regular outlet in my house. That's with only 1 battery hooked up! I've already been so impressed I can't wait to have the 900ah hooked up!The compact size of these 300ah Mini's is remarkable! Each of them is about the size of my previous 160ah lithium-ion batteries. I am going to be able to double my total power in the same space. They do weigh more (about 57 pounds each) than my previous batteries, but that is to be expected with their higher density..... or whatever they've done to pack so much power into such a small battery.

I bought this battery in advance because of the good deal before I needed it thinking it was a 300 AH battery. Will prose the YouTube guy prove as Murray povich says is a lie. The company did good and gave me a $50 credit. Today I finally inbox the battery as I'm ready to install it into my Toyota sunrader and realize the top cover popped off completely. I tried to pop it back in place and it just won't lock or sit right. Considering I've never used the battery I'm incredibly disappointed i didn't check it sooner under warranty. Buyer beware and test it immediately. Dont trust black Friday deals. I'll post photos when I can it appears not enough sealing glue or epoxy was used or even installed completely. What a disappointment as I get ready for my memorial weekend camping trip.

Excellent value 280 Ah (~310 Ah tested) LiFePO4 battery. I can’t DIY a comparable battery for less money. Its build quality is also better than a DIY version. The Wattscycle doesn’t current limit its output until 600A; so, I just added a 250Ah breaker to its positive terminal for my application.Its initial Ah capacity tested at 311.53… excellent.The BMS max charge tests = 14.1V (3.52V per cell) but the manual states 14.6V for over voltage protection. This could indicate the cells are not adequately balanced by the BMS and 1 or more are going over 3.65V which causes the BMS to shut down early. Alternatively and most probably, the BMS is actually programmed to 14.1V vs 14.6V. Since this occurs on the “hockey stick” end of the charging curve its impact is insignificant as demonstrated by its excellent measured capacity.This version of the Wattscycle also doesn’t provide a BT BMS but I achieved this functionality in a different way. I am using this battery in parallel with my DIY EVE LF304 Ah (320 Ah tested) + Daly BT BMS modular solar generator system. I connected a single Victron Smart Shunt to both batteries in order to BT monitor the state of both parallel batteries. The Smart Shunt’s parallel capacity minus my DIY EVE LF304 LiFePO4 BT BMS reading yields the real time state of the Wattscycle battery.

So far it is way better then the two deep cell lead acid batteries I was using. With the lead acid batteries I could only run my inverter one night and hope I could get enough charge in them for the next night. By the end of 3 days they were dead. With this 300 amp lithium I was able to run the inverter 3 nights and it was still over 12v. If I have ample sun I can run things indefinitely. My only regret is that I didn't upgrade to the lithium sooner.

It’s a little bigger than a regular RV battery but it is worth it. So far it is working great at 14.3 volts out put. I added a 3000 watt inverter and First test is coming in April using Bipap machine overnight at dry campground

Poor inadequate packing which means you will likely receive a defective non usable battery. Amazon said this was not returnable and then after many attempts with customer support I was finally able to submit pictures and they are now they are seeing what they can do. Watt Cycle response has been overall poor, this would not have happen if they didn't cut every corner and actually spent a few pennies on stronger packaging.

Testing good so far

Eliminated 2 deep cell batteries and replaced with this battery in the same location. Increase storage capacity by 50%