The action camera mount for Rigiet fits: GoPro Hero 3, GoPro Hero 4, GoPro Hero 5, XiaoYi 4K and GoPro Sessions

Rigiet can support every smartphone with a width up to 85mm and 220 grams weight.

This means it is compatible with every iPhone (included 7 Plus) and almost every Android phone (except photablets).

A quick google search with your "smartphone brand and model number width" allows you to find dimensions of your phone.

220 grams.

Simply speaking, the battery that we offer, whose capacity is 3340 mAh, can support Rigiet’s working at least 3 hours when the battery capacity is full.

In detail, how long the full battery can support gimbal’s running mainly depends on:
1) How heavy the cellphone is
The heavier the cellphone is, the shorter the battery can support
2) whether gimbal is balanced
the more balanced the gimbal is, the longer the battery can support
3) how often the motors rotate
the more often balanced the motors rotate, the shorter the battery can support

We have tested it that when iPhone 6s is mounted on the gimbal, balanced, it can be supported at least 3 hours however often you rotate the gimbal.