VanBox Thunder D2 15000mAh Dual USB Port Power Bank Portable External Battery Charger for iPad Air Mini, iPhone 6 5S 5C 5 4S, Galaxy S5 S4 S3 Note 3 Note 4, Nexus, HTC, Motorola, LG and more (Aluminum, Grey)

This battery pack is one of the most powerful rechargeable battery chargers that I have ever tested. It is also matches the highest quality design and construction. I was so impressed that I put the test results of the unit for you.What's in the box?* The VanBox 15000 mAh high-capacity Gold battery pack* The battery pack comes with a user manual* The battery does not come with an AC wall charger.* There is one charging cable for the battery pack or your smart devices. It is 23.6 inches long.* The 18 month warranty card* A nice carrying bagThis battery pack is simply beautiful. The gold aluminum is fantastic. The size is 5.9x2.3x0.8 inches and it weighs 12 ounces. The battery pack has two USB smart output ports (DC5V 2.4A, DC5V 1.5A )to meet the unique charging needs of the device you have plugged into it. It uses a chip to help select the proper current to allow the maximum safe charging current for the fastest device charging.This battery pack is a real powerhouse of energy and in my test results it performed extremely well in supplying a charging current to an iPad 3 and an iPad 2. It is also designed to allow you to charge two items at the same time. I also tested the battery pack charging and iPad 3 and an iPhone 4 simultaneously. I was also able to charge the battery and charge two devices at the same time using the battery while it was charging. (This is not recommended to do) You may need to use your original charging cables for some devices so take them with you if you need them.It is a great power resource to keep your USB recharged devices operating on the long work or while you are traveling. This battery pack is a powerful source of power and many people like me are power users of their smart phones and tablets and need a battery like this. If you are constantly using your phone or tablet then you know that they will run out of power sometime during the day or evening. If you are not near an AC wall outlet with your charger or in your car with a charger what can you do? It is especially important to have some way to recharge if you are traveling in a plane, in the middle of a school classroom or on a bus or train. In addition many of the newer tablets are real power hungry devices and it takes a lot to recharge them.Here is a powerful battery pack with two USB ports. It can charge your tablet devices or charge your smart phone and if you want it can do both of them simultaneously. I charged two iPhones at the same time in my testing. One USB output is rated at 5 VDC and 2.4 Amps and the other is rated at 5 VDC and 1.5 Amp. It uses Lithium-Ion battery technology and carries a 15000 mAh capacity. It has six powerful high quality batteries rated at 2600 mAh each. So its really capacity is actually 15600 mAh.I do an extensive set of tests that fully charges the battery and then I use it to charge devices and make sure that it is fully depleted when my tests are done. I time each test and document the results as the test progresses. I then calculate the mAh of capacity that the battery supplied and I then calculate its charging efficiency. This process takes from 3 hours to, in very large batteries, about a day for testing. I don't take any short cuts or guess and every battery has these tests performed on it and documented. This is to assure that the battery is tested and it performs well. If a battery has performed poorly I then run the tests again to verify the results.This is a very good product and below I have listed its features and benefits as well as my test data for your review.The VanBox15000 mAh battery pack features:* Powerful 15000 mAh capacity specification* The unit is compact in size and weighs in at 12 ounces this is the smallest size 15000 mAh battery pack available.* It is attractively designed in gold Aluminum. The front has a push button for starting the charging of your device or to read out the battery's charged capacity using LED lights.* It has LED lights that show the battery charge. When three LED is flashing the charge is 0 to 25%, 1 LED steady on means 25 to 50%, 2 LEDs steady on means 50 to 75%, 3 LEDs on means on means 100%.* There are two USB power output ports. One USB is rated at 5VDC at 1.5 Amp and the other USB port is rated at 5 VDC and 2.4 Amps. I could charge my iPhone 4 in one port and my iPad 3 in the other port.* You can charge two items simultaneously.* Press the ON button when you plug in a device and that begins the charging process of your device. And you don’t need to unplug it when you finish a charge, it will be off within several seconds.* The battery uses Lithium Ion battery technology and uses 6 high capacity cells rated at 2600 mAh each.* The battery pack can be recharged 500+ times* Warranty is 18 monthsI was too busy to measure the output capacity when I received a sample product for evaluation. This is a great product and deserves a 5 Star rating!