[Nexus 7 (2013) Accessories] krash183:
Now I wasn't ever the type of guy to have spare batteries for my electronic devices because I always just kept a power bank in my bag for a quick charge. Also, the good thing is that I didn't have to turn off my device, remove the case, remove the cover, replace the battery, put it back together and then wait for a reboot.

I travel a lot. Different cities, lots of plane rides, layovers at airports (sometimes those charging stations are crowded and you always have those people that set there the ENTIRE time) or not enough plugs in your hotel room for all your devices.

I've always used Ravpower power banks because they're sturdy, good capacity and reliable. Best of all they have top notch customer service! They called me once after I bought a powerbank just to make sure everything was good with the device and everything was working as I expected.

First the dual output Ravpower 14000mah w/ led.

Part Number	RP-PB13

Item Weight	10.2 ounces

Product Dimensions	4.8 x 0.8 x 3.2 inches

Two outputs:

1) 5v/1amp

2)5v/2amps

I've tried every electronic I have ranging from Galaxy s3, Nexus 7 2013, Nexus 10, Ipad 2, Ipad retina, Iphone 5, Clip+, Colorfly c3, Tralucent T1 amp, Arrow 4g amp digital cameras, ipods you name it it charged it. It can charge two devices at the same time thats the great thing about it.

What it comes with:

2 coiled usb adapter cables with a standard usb on one end and adapter end to fit all the other fittings for devices. The included fitting are

- 1 x Micro USB Connector

- 1 x Samsung 30pin Connector: Galaxy Tab, Galaxy Tab 2,Galaxy Note

- 1 x Mini USB Connector : some cell phone, MP3, MP4, digital camera, and other with mini USB slot digital devices

- 1 x Nokia DC 2.0 Connector: Nokia cell phone with DC 2.0 port

It charges via a micro usb port and it takes about 8 hours to go from completely drained to full charged based on 3 cycles that I've tested. Also, it has a great slow discharge rate when its just on stand by and not charging anything. So it can sit for days - weeks and keep its charge.

To start charging a device you simply can use the supplied usb cables or ones that came with your device (mp3 player, phone or tablet) plug it in, press the power button and voila! A nifty feature is the auto shutoff when you disconnect the device so it isn't wasting its own charge. This is a great feature to conserve energy.

There are indicator lights that light up when the power button is pressed to check its charge.

1-light = <25% charge

2-lights = 25-50% charge

3-lights = 50-75% charge

4-lights = 75-100% charge

Next up is the

Ravpower Extreme 15000mah (triple output)

Part Number	RP-PB11

Item Weight	13.4 ounces

Product Dimensions	5.9 x 0.9 x 3.2 inches

Item model number	RP-PB11

Size	15000mAh

Color	Black

Three outputs:

1) 5v/1amp

2)5v/2amps

3) DC output from 9v-12v

This thing is a BEAST. It can charge up to 3 devices and 1 being netbook.

It is larger but the benifits of it are amazing. It can also charge all of the devices like other powerbank but it has a 3rd output for netbooks/laptops/camcorders/gps.

It has all the different fitting for the usb ports.

- 1 x Micro USB Connector

- 1 x Samsung 30pin Connector: Galaxy Tab, Galaxy Tab 2,Galaxy Note

- 1 x Mini USB Connector : some cell phone, MP3, MP4, digital camera, and other with mini USB slot digital devices

- 1 x Nokia DC 2.0 Connector: Nokia cell phone with DC 2.0 port

but it also has different plug ends for different laptops/netbooks (see above picture at the top left) for the 9v-12v output.

The 3rd output has a switch to choose between 9v or 12v from the 3rd output.

Like the other powerbank it has the auto shutoff feature when not connected to anything. The discharge rate of this is even better/slower when not charging anything compared to the first one.

Unlike the first one, this has a dedicated wall adapter that uses a laptop style plug to charge it. It charges A LOT FASTER than the other one. This charges from completely discharged to fully charged in 4-5 hrs.

Build Quality:

The buld quality on both is amazing. Nothing is loose, creaking or flimsy. Completely solid to the feel of it.