If you find your smartphone is always running out of battery and it's a hassle to bring your charger around with you wherever you go, this backup phone could very well be the answer. Currently seeking finances on crowdfunding platform Kickstarter, the Talkase by WirelessMe is a mini GSM mobile phone that's there for you when your other phone runs out.
The credit card-sized mobile phone is ideal for travelling. If you already are carrying two phones around with you, this is also a space-saving solution. The backup phone is also an iPhone case, so it is located right on the back of your primary smartphone. The super slim accessory and secondary mini phone is near impossible to forget as it is incorporated into the phone you already use all of the time.