This article explains how to save battery life while using your phone as a Wi-Fi hotspot. Turning your Android phone into a Wi-Fi hotspot or using your iPhone's Personal Hotspot feature to share your data connection with other devices (such as your laptop and iPad) is convenient and practical for today's mobile lifestyle. However, it can be detrimental to your phone's battery life.
DO NOT USE portable mobile hotspot without knowing this!! Smartphone Hotspot Issues
Smartphones already use more battery when they are surfing the internet than when they are not, but a hotspot requires much more than the phone’s standard internet usage. The phone not only sends data to and from the hotspot network, it also sends information to the connected devices.
If you use your phone's hotspot feature extensively and battery life is a concern, it may be worth purchasing a separate mobile hotspot device or a wireless travel router.
One of the most common tips to improve your mobile phone's battery life is to disable unnecessary services running in the background.
