He’s providing iPhone battery advice — free of charge.

An expert in technology recently provided some simple tips to prolong the life of your smartphone battery, which could amaze disgruntled Apple customers.

“The biggest villain for iPhones is their battery,” tech aficionado Thiago Derminio began in a viral Instagram video.

“Everyone complains that it runs out too quickly, and this gets even worse over the years.”

First, Dermino said to poke around the settings page and use the dropdown search bar for the “Siri and search” page. Once there, uncheck the background battery tasks underneath “suggestions from Apple.”

Then, head to “accessibility” in settings and toggle on “reduce motion.” Next, go under “general” and turn off “background app refresh.”

Dermino explained that these are common settings that “consume your battery in the background, and you don’t need them to be activated.”

Users were grateful for the little-known tricks, with one exclaiming: “Need to do this!”

Herby Jasmin, founder of the website Gotechtor, recently shared another obscure way to preserve battery life as well.

If you are willing to have a dimmer display, change your settings to “reduce white point,” he explained.

This is done by going into the “accessibility” tab of settings and then into “display and text size.”

Once there, you can toggle the white point reduction on and off.

PC Mag additionally recommends turning off location services and being selective about which apps send you push notifications. The outlet also suggests shutting off Siri’s “active listening” feature as well.

Apple additionally suggests using auto-brightness, low power mode, and WiFi to preserve battery life.

In the “battery” section of settings, users can also see the percentage of efficiency their battery is performing at, and which of their apps is using the most power.