All four batteries are charging. I do not have to disconnect and re-connect the charging cable on each individual battery. The unit will charge ONE battery at a time, but all four will be charged in sequence. by the battery with the most charge.I travel a lot due to my drone business. This means I am always charging batteries between jobs by plugging the chargers into an inverter in the back seat of my car. I bought this charging hub thinking that I could plug in four batteries at a time and not have to babysit them as I drove. Unfortunately the poor design of the connectors causes the batteries to dislodge with the slightest bump or bend in the road. I am actually more distracted by glancing back frequently to see which battery bounced off the hub than I would be just pulling over to swap the batteries off a single charger. Whereas the standard DJI battery charger has a firm connection to each battery, this charging hub has charging slots that are very loose. The batteries barely stay connected unless you have the hub on a completely flat surface. Good luck getting it to work on any uneven slope of a car seat, car floor, or trunk, especially when the car is moving. I am scratching my head wondering why DJI didn't design this with an even slightly more firm connection to each battery.This product gets 2/5 stars because at very least it is more convenient to set the batteries on the charger hub at home and not have to check on them periodically like with a single charger. But at this price point I am very disappointed with how useless the hub is in a moving vehicle. You would probably be better served buying a more powerful inverter for your car and then buying one or two more standard charging cables. The only thing this hub buys you is a bit of convenience back home.This worked so well for almost a year then the (cheap) plastic used to hold the charging PC board in place gave out and as a result the charging tongues don't insert deep enough into the batteries and they don't charge. I'm not sure if this simply was a rare defect or if the plastic they used isn't suited for this sort of application.I tried to get DJI to send me a replacement top for the charger (offered to pay for it) but that's outside their abilities it seems - and the unit is out of warranty.The Charging Hub works but because of the plastic failure it can't connect to the batteries. My plan now is to get longer screws that will go deeper into the mounts (there's room to spare) and then of course baby the fu@king thing. I didn't think I was that rough on it and I can't say I used it more than 10 times over the course of the year.Update - I was able to repair the charger by replacing the DJI screws with longer M2x14mm self tapping screws and the repair seems solid but trust me I'll be extra careful with this from now on.Here's a link to the screws I used - https://www.amazon.com/gp/product/B01EIHM0WQ/ref=oh_aui_detailpage_o01_s00?ie=UTF8&psc=1I am very happy with this product. As usual, Amazon delivers another great item.Item is just as advertised. Just know that multiple batteries are charged sequentially instead of simultaneously. This makes sense as otherwise it is a 4x draw on the power from the circuit and might overload most breakers. The beauty of this is that you hook 4 batteries up and go on about your day or go to sleep to come back to find them all charged. Very pleased with this product.This is a must have if you have 4+ lipos. It does not charge them all at the same time. It alternates charging one battery at a time. Some dislike this, but it allows you to walk away and not have to switch out the batteries each time one finishes charging.OK product. C+. I did have one battery go bad because I left one to long. DO NOT LEAVE YOUR BATTERIES UNATTENDED during charging. Luckily my house didn't burn down. I left on overnight to charge before a job.works great, wish it charged all the batteries at once...Put 4 batteries onto the charger - Bit of time later some witchcraft occurs and hey presto 4 fully charged batteries - Use with the charger that came with your inspire 1.FineExcellent product and very quick informative service, would highly recommendNo it doesn't charge 4 batteries at one time, but it's nice to be able to put all four of my batteries on charge and not have to worry about them, just walk away and let it optimally charge them. I've blown up two batteries by forgetting I was charging them, at $350 each, it's a costly mistake, no longer have to worry about that, always charged whenever I want to fly, holds them in place for better organization, does what I need.Product quality fantastic. packaging need some more attention. received first delivery completely damaged, ordered second one.... packaging was damaged too.