Does an iPhone battery replacement give better battery life?

I have an iPhone 5 that's running ios 9 and i get poor battery life. Around 4 hours. My iPhone is 3 years old, and I'm wondering if I get a new iPhone 5 battery, if I will get better battery life.

Well yea, since the charge capacity would be better since it is a new battery, a new lease on life if you will.

I would be inclined to have a play with your current setup first

there are plenty of apps that constantly run even when you believe they are closed

delete what you don't need, especially apps that are constantly communicating with you

then do a google - iphone 5 battery - see some tips for getting improved life - may mean changing some preferences

after that, if still a problem. Sure, look into getting a new battery or upgrading

Iphone 5 batteries have recently had a recall so definitely a battery replacement should fix things. Let your store know and they might do it for free due to the recall.

A fresh battery is ALWAYS going to do better than a 3 year old battery. As long as it is an OEM battery and not a cheap Chinese knock off that is.

https://www.apple.com/...5-battery/ explains the phones that qualify for the replacement battery at no charge.

You do NOT want to buy a new battery (if you aren't under the recall) and try to install it yourself. Opening an iPhone and changing the battery are are very delicate operations requiring specialized training and equipment.

Now you have a phone with a short charge life. Try to change the battery yourself and you will more than likely have a destroyed iPhone that can't be repaired by a tech.

If it is not under the recall, you might check with https://www.icracked.com/ to see if they have any techs in your area and what their price would be for changing the battery. It will be much less than the Apple Store price.