How to make battery last longer?

I have an iPhone 6s and an Apple Watch series 2. Any tips how to make my battery last longer?

Dim the screen

Paint it black

If you rub it in your hair for 2 minutes several times a day the static will help it hold a charge better

If you put it in the microwave it'll help activate the lithium in the battery which will extend the battery life

You can go to google play and type in battery saver and get an app that helps to save your battery, plus check for programs that are still running even when the programs are closed, that will run the battery down.

Charge your battery when it has min 10% charge

Reduce screen brightness. The easiest way to conserve battery life while maintaining full function is to reduce the brightness of the screen…
Turn off the cellular network or limit talk time…
Use Wi-Fi, not 4G…
Limit video content…
Turn on smart battery modes…
Use Airplane mode.

Low battery mode works pretty well. Also considering the fact that you have an iPhone 6s you may need a battery replacement. They're easy to do on your own or you can pay someone to do it.

I putted a list here to show you how to make it last longer.

1. Turn your brightness all the way down (Slide down the top of the screen and where the slide bar is by the sun, turn it down.)
2. Stop apps (Go to setting, than go to storage, Than applications, than click on apps you stopped using for a little bit and click on or tap on "force stop", notice than apps that you don't use up to 2 days force stopped on them by themselves.)
3. Close tabs out (You should know how to do that)
4. Don't watch to many videos because that will decrease your batter life if you continuously watch videos.

And that is all I can think of right now but it should be enough information for you to make your battery power last longer.

Charge Charge Charge