Really nicely designed Charging station for the DJI Spark. It's designed to charge 2 spare batteries plus a third installed in the Spark itself, all while plugged into a wall socket with the included power brick. On top of that it's built-in battery allows it to act like a phone power bank allowing untethered charging of the Spark and batteries whilst on the move. A USB outlet allows charging of the remote controller or any other device. Acts as protective storage for the batteries and Spark as well. My only concern is that the top clamping bracket is made of plastic and in concerned it might crack on or break when stressed, whilst travelling with it in back pack. Overall great design and well worth the money spend.This is the second most important accessory for the DJI Spark. The remote is the first! Add a few batteries and really get the most out of your drone.The ability to charge on the fly in a package that packs for travel and simultaneously charges three batteries is priceless if you are flying often. If you are flying once and putting it away it may not be worth it. Additionally it can charge your remote or cell phone on the fly. At $67 dollars it’s a great improvement over playing with cables and fighting for outlets. If only it had a 12v charger.Best charger for my dji drone it charged my drone batteries 4 times and remote 4 times cell phone 4 times so if u need a great battery charger get this one worth it easilyAlmost perfect. Wish it had a D.C. Input to charge in a vehicle.Update mid June 2020: I've now much more experience with this. There seems to be a common problem that I've now observed. The middle battery slot, which must, in order to supposedly work properly, be attached to the bottom of your Spark.All to often this center charging slot doesn't connect sufficiently to the battery on the bottom of your Spark installed there to charge, despite the fairly strong down pressure applied by the strap over the top.I'm really tired of having to baby sit this by watching when the indicator lights show lack of contact and thusly pressing down on the hold down bar across the top until the charging light indicates properly.Seems the "socket" in the center for the Spark/battery doesn't allow that combination to seat properly into the charging pins.Dang!1 September 2020 update: I now place a dense foam pad the the underside of the cross arm to press down on the Spark so battery charging contact is made.If you own a Spark and have a number of batteries, this is a really good charger to own. I used it to transport my Spark and 2 extra batteries in my backpack. The best thing about it is the fact that it will charge the batteries as well while you're out without having to plug it in. I do not know how many recharges it will provide but I was able to recharge 2 batteries to full. Buy it if you do not have it yet.Great design and product. Add little to the size of my travel kit. It secures and protects the drone and will charge the drone and 2 additional batteries at the same charging session. While traveling the batteries will charge when electricity isn't nearby since the charger has it's own battery reserve. The onboard USB can be used to charge the remote or your cell phone as well.This charger is awesome very well worth the money charges batteries twice as fast as the normal charger that comes with the spark. And the charger has a battery in it which charges you're drawn when you're out in the field. The battery charger keeps your drone and its propellers locked in place so there's no damage to your drone the only thing I wish it came with was a case for the charger I have ordered one and it is currently on its wayJust had mine arrive yesterday along with a couple of spare batteries. I charged the base by its self first then used it to charge up both spares without a hitch. The system automatically shuts off after charging, so no problem of over charging batteries. The design was well thought out as you can use this as a carrying case and base charger, it indeed is a all in one system.Estoy súper satisfecho con el uso de este artículo ahora le da más autonomía a mi dronCompany's seal intact. Nice pack by seller. Its worth buying,Could also used it to carry two battery and drone- safe space while carry around.Awesome as expected.