How can I stop my phone from draining battery so fast?

If you have an iPhone 6s like your signature says, your battery has probably degraded over many years of use. Can you go into Settings>Battery>Battery Health and tell us what the current maximum capacity percentage is?

As deggie previously mentioned, your battery needs to be replaced. You can have this done at an Apple Store or Apple Authorized Retailer. But because you have such an old phone, I would recommend just buying a new phone.

We are NOT apple. WE are all users on this forum. And you have to realize batteries are consumable devices. They don't last forever and you're phone is now approaching 5 years old. You got more than your money's worth from that battery. A battery costs $49 from Apple, which is actually pretty reasonable.

Think of it this way. If you put a battery in a flashlight and you use that flashlight everyday, will it last forever? Of course not. It will eventually no longer hold a charge and you'll have to put a new battery in the flashlight. iPhone batteries are rechargeable, but every time you fully recharge the battery it loses a little of it's ability to hold a charge. Apple can't defy physics, so there is no shame on Apple.

Get the battery replaced for less money and you will have a new phone especially when your iPhone has a bigger memory. That's what I did with my beloved 6/ 128 and the SE/ 64 of my daughter.

Nobody will scrap a flashlight when the batteries are worn out!

Needs to be replaced.

Hi Reggie,

the more memory your iPhone has the more it‘s worth to install a new battery because you paid more money when you bought the phone.

I never said the a new battery will increase your memory.

ervau

Can you explain how putting a battery in an iPhone will result in "bigger memory"?