BLUETTIB300K Expansion Battery, 2764.8Wh LiFePO4 Battery Pack for Power Station AC200L AC300 AC500 AC200MAX, Extra Battery for Home, Emergency, Road Trip

A breeze to connect to my AC200L. Was delivered with about 75% battery capacity full. Everything working perfectly. No issues. The cable for connecting to the AC200L was included.

Had it for six months. No issues.

The media could not be loaded. Recently bought this Bluetti B300K to exoand my AC200Max. It over doubles the power of the AC200Max. It comes with the cable to connect it. Easy to hook up. The quality of build and materials is great! It charges only through beung plugged into your Bluetti solar generator that you plan to expand the battery power of. Once hooked up, you can charge them with solar panels, plug into an outlet. The B300K comes with only one USB-A type USB input. The power button must be held down for about 3 seconds to turn on. The lights are bright. It has 4 lights to represent the batter power of it. Each representing 20% of the power. And the power button lights up. This battery has a lifecycle of up to 3,500 charges from 0 to 100. After that, the battery will deplete 20%. Meaning you CAN STILL USE IT afte the 3,500 charges. And charge it from 0 to 80% of the battery's power for a long time. The functionality is easy and nice! The B300K weighs around 65lbs. But is easy to move around. The handles are sturdy. You can also see the battery percentage with the Bluetti app. And control several different Bluetti generator models with it.

I have been buying products from Bluetti for over a year. I am very happy with their sales, products and especially their service. I have communicated with them many times and get a very quick response. I have gotten to know many of the support people by their first names and I feel they know me an my needs personally.I own 1 AC300 solar generator, 5 B300 batteries, 2 B230 batteries, 1 AC200Max, 1 AC200P, 1 EB55 and 1 AC10.We live in the Palm Springs are where the most important part of electrical use is Air Conditioning. No A/C no survival. Our biggest fear here is a GRID DOWN situation due to a major earthquake or terrorist and/or war scenario or weather related. I study GRID SECURITY NOW! website that educates us to the possibility of losing our electricity for a long period time. I have over 23000 watt hours and 20 solar panels to keep my A/C window units and refrigeration and fans and communication alive.Sunday I watched 60 minutes and they did a series on THE GRID. This reinforced my plan to prepare for a scenario that would leave us without electricity for weeks or even months. My Bluetti equipment is here to save our lives if this were to happen. We are also stocked up with 6 months of food and water, TP and survival equipment along with Grid Down Bluetti survival Solar generators and Batteries and solar panels.At this time I use and test my Bluetti equipment every day. I use my AC200 Max and B230 batteries for television and fans. I use my AC300 and 4 B300 batteries for Window Air conditioning units that I use daily mostly after 4 pm and all through the night. Then I start charging them again in the daylight hours. If there is not sun (we get 300 days of sun a year here plus) I have a 7500 watt generator with propane or natural gas that will charge the batteries quickly and efficiently. I have a second 5000 watt generator (propane) as a backup. I also have 10 large propane bottles and a natural gas house hookup.I probably have $20,000 dollars invested in Bluetti products for survival and I look at it like insurance. My fire insurance costs me $1100 per year and my earthquake insurance costs me $1200 per year. Bluetti is my GRID DOWN insurance plus I use it daily to save electricity cost when electricity cost are rising at exorbitant rate with no sign of slowing.I am a prepper and survivalist and I feel Bluetti has the best quality product and my confidence in their backup and support make me and my family very secure.THANK YOU so much Bluetti Company and the entire Staff.

Bluetti decided to discontinue the B300 expansion battery. The B300K is the replacement. It doesn't run as long and can't be charged without a head unit (3 or 4 options for a head unit). I'm disappointed that the B300 is not made anymore, but the B300K works, just not as long.

We trust the Bluetti name for quality and expand ability they offer. Easy to expand, monitor power levels for each unit and recharge with their built in electronics. Multiple boxes can be recharged by plugging in a single plug, what can be easier.

I bought this B300K because my electrical needs have begun to strain my AC200Max, which I have had to charge every day. Living in the Desert Southwest, we are approaching more cloudy days, meaning charging the AC200M will be more challenging, and my needs have only increased.I have been a Bluetti fan since my last solar battery, an orange one whose name starts with “J”, failed on so many levels, including two panels that completely stopped working after ONE. YEAR. I had a problem with my AC200M when it first came out; their customer service is exceptional, and the problem resolved (by exchanging the defective unit immediately) without complaint or delay.This B300K is plug-and-play, meaning all I had to do was plug it into my AC200M with the heavy cable provided, and presto, green lights! Because I was already charging, I did not even have to push the START button; it starts immediately when connected to solar. After a couple of days, the power in the two units balanced (automatically) and I no longer have to charge every day; I have much more available power in the setup.I have no reason to buy any solar battery or accessories from any other company. Well done, Bluetti. Very well done.