A remote worker with an iPhone is not complete without a Mophie Juice Pack Reserve - the best iPhone battery case:
With the push of a button your iPhone gets 60% extra battery life.
It has a built-in rechargeable 1,840mAh lithium-ion polymer battery.
The built-in rubberized support pads protect your phone from drops and hard falls.
This is the most compact battery case for iPhone 6 by Mophie.
It adds only 0.3 inches to the thickness of your phone and weighs in at under 3 oz.
What's great about the juice pack reserve is that you don't need to remove your phone from the case; simply leave your phone in the case while charging as it will charge both together!