However, it can wreak havoc on your phone’s battery life.
These tips apply to Android and iOS devices.
For instance, shut off Wi-Fi if you don’t need to connect to any nearby networks.

Lifewire / Brooke Pelczynski
Androids can access this by choosingSettings>Location> move theOn/Off slidertoOff.
Believe it or not, the phone’s screen uses a ton of battery.
Adjust the brightness to save even more battery life to maximize your hotspot battery.
The setting is in the same place as brightness options for the iPhone, and in theDisplayscreen on Androids.
Other Battery Tricks
Another battery-saving tip is to keep your phone cool.
As a phone warms up, it sucks away even more battery.
When using your phone as a hotspot, put it on a flat, dry surface like a table.
The phone can suck away at the computer’s battery for as long as the laptop has a charge.