Backup iPhone 6s Battery
If you don't want an iPhone 6s battery case, but you need extra power to get you through long days the Mophie PowerStation Plus is a perfect solution. This small battery includes an integrated lightning cable so you always have a way to charge. You can also use this to sync your iPhone to your computer.
This is available in a 3,000mAh and a 5,000mAh version depending on how much power you need. Read our Mophie PowerStation Plus review to see why we love this iPhone 6s accessory.
$79.99 at Amazon