Keeping your iPhone on the go does not have to be difficult. Not when you can rely on a solar charger to get the job done. Sun Strap happens to be a flexible solar charger that fits around any bag strap and has a built-in 5600 mAh battery to charge your gadgets. It can handle your iPhone and even GoPro camera. The charger weighs only 5.8oz, so it does not make you uncomfortable.
Sun Strap uses a 1.5W flexible solar panel and has a LED battery indicator light to give you an idea when your battery is fully charged. This can handle iPad mini and Android devices too. You can get it on Kickstarter.