We have introduced many nice power banks, but if you also need an extra wall charger, the following XE4400 backup battery may be more suitable for you.
The XE4400 is a multi functional power bank that measures 4.125 x 3.5 x .75 inches and weights 9 oz. As we can see from the images, the versatile backup battery features smooth portable design, and comes with a 4400mAh rechargeable battery, moreover, two integrated USB ports allows it to charge two mobile devices at the same time when you’re on the go. Apart from that, the backup battery doubles as a wall charger in order to simultaneously charge your USB devices and internal backup battery at home or in hotel.
The XE4400 backup battery with wall charger is priced at $39.99 USD. If you’re interested, jump to ThinkGeek for more details. Additionally, if you need other options you might like to check juiceBee 2-in-1 backup battery and more via “backup battery” tag.