Released on September 19, 2014, this 4.7" screen iPhone is the smaller version of the iPhone 6 Plus. Identifiable by the model numbers A1549, A1586, and A1589.

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Performing at half power?

I replaced my friends iPhone 6 battery but his other friend told him to buy the cheapest things. So now his phone is constantly running at half speed. It’s as if low power mode is on 24/7 but it’s worse cause it makes the phone lag a lot. Anyone else experience this.

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Sounds like you got what you paid for.

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I would say, poor quality battery. A new battery should fix this issue.

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Most Helpful Answer

his other friend told him to buy the cheapest things is certainly a red flag!

To be certain, use a battery utility, such as coconutBattery (for Mac) or 3uTools (for Windows). It will tell you what the health of the battery is. Anything less than 75% of design capacity will require replacement.

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@refectio how do I find the health of the battery? I have installed 3utools but I dont see capacity at all

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