Works Great! Great if you have multiple batteries to charge. Also works great with the  DJI Phantom 4 Portable Car Charger Kit.
580524
Works great with the OEM DJI Phantom AC Adapter and DJI Phantom 4 Portable Car Charger Kit. Charges batteries, one at a time.

As a general charging note, because the battery status indicators are so bright, I would not recommend doing it somewhere you are trying to sleep. The blinking green LEDs, on the batteries are very bright and will light up a dark room without any problem. I found it difficult to try to fall asleep to the blinking LEDs.
1592708
Works great! Nice to be able to have double the battery power. Also great is the AA battery option if you can't charge your batteries where you are.
3703691
I love this charger for my daughter's hs200 we have four batteries for her drone so it's very nice to be able to charge all of them before we go out to fly
3538057
Bought 3 extra batteries for my Phantom and decided to get the multiple port charger.  When I have all 3 batteries on the charger at the same time, the first port won't charge.  I've tried to switch batteries, but regardless, the one port never provides a charge.  If I use the other two ports, they charge (each on an individual charge), just the one dead port.  But, still works for charging two batteries.
2395686
I've had the Stanley GBCPRO for a few months now.  I've used it to charge my 12v car battery, as well as 24v and 48v backup/solar battery banks without any problems.  The build quality seems good.  The fact that it will automatically detect and charge batteries of different voltages is a big plus for me.  Nice to be able to purchase one multi-function charger, than to buy and store two or three different chargers in the garage.
3382390
works great.  not only can I charge two batteries at the same time, but I had 3 or 4 older batteries that would not charge in the camera any longer, and this charger was able to charge them.  Now I have 6 useful batteries to use!
3424793
Okay - those of you who have 10 batteries like me AND or even just travel will love this. Came with US an Euro plug. But mostly if you've traveled you know that hotel rooms and access to outlets is difficult. I even bring my own power strip but with these guys I can charge overnight 2 batteries at once per unit. It also has a GREAT charging status indicator (like a power meter scale) that shows how charged the batteries are.

I would recommend this charger. The build quality is the same as any other third party (and to be honest Nikon's OEM).
2043411
The charger and batteries work great with my Nokia S9300. I love that the charger can be used both at home and in the car. :) I take too many pictures and my single battery (that came with the camera) would be constantly 'exhausted'.  It was very frustrating trying to video my sweet little one and having it say 'battery exhausted' in the middle of her performance. Happy now that I have 4 batteries and can just swap out when one becomes exhausted.
104558
I've used this for a while now and tried it with iPhone 4s and 5 and some Droid phones and it works great.  It can charge a phone 3-4 times with battery to spare.  Easy to recharge, just plug in the USB cable.  While it can charge an iPad it cna't charge it fully.  If you need extra power for smartphones or other small devices this is great.  If your looking for tablet power look for a larger capacity external battery.
133881
Works great.  Have a battery charging and then just swap batteries out near the end of the day if needed.  This charger works with the wall charger it comes with or the same charger you use for you phone so you don't need to travel with a lot of extra stuff.
3001413
Love it! Works beautifully and charges all 6 of my batteries. Better than 1 at a time for sure.
785667
Worked perfect recharging my batteries for my HERO4 Black. We did a lot of SCUBA diving on our trip and I needed a way to charge multiple batteries each evening. No issues, very easy to use, and charged quickly.
3113769
I purchased this to charge the three batteries for our HS220W drone. It worked like a charm!
3753250
Our previous charging system appeared to not be working, so I purchased this as a replacement. Works great! Charges quickly (within a couple hours) and is compatible with the battery packs from our original charger; so now the kids can be charging 2 while playing with the other two.
4822683
This charger is a good 3rd party charger. If you lost the original charger with your drone or need an extra charger this will get the job done, but just barely.

PROS
Low Price
Charge two batteries at once

CONS
Slower than DJI original charger (90 mins to charge)
Ive read here people saying you can, but I do not recommend charging batteries and remote at same time

 If you are looking for a replacement for your phantom 3 pro charger, this is not what you want. Cheap, works, not fast charger but it reliable.
2602941
Great device to use if you want to charge multiple devices at once. The 2.1 amp connectors for the iPad charges it very quickly and can charge an iPad with less than 10% battery in about 4 hours! Almost twice as fast as standard charger!! I highly recommend this product!
3425174
Love this charger, I can do 4 batteries at a time! I charge 2 main packs for my hexacopter and 2 smaller packs for my video receivers all at the same time. The charger is not too loud as some said, I found that it was pretty quiet with just a small fan running at times.