How to get your iPhone battery replaced by a third-party repair firm
Another option is to speak to a third-party iPhone repair specialist, who often charge a lot less than Apple for the replacement service.
Some repair specialists are better than others, so we strongly recommend reading comments and feedback from other customers first. But a quote we got from Animacs, a highly reputable Peterborough-based repair centre, was just £10 to replace an iPhone 4S battery, which includes labour costs.
In addition to the battery-replacement service, Apple offers some tips on its website to maximise the lifespan of your iPhone's battery.
In particular, it mentions that temperatures above 35 degrees can permanently shorten an iPhone's battery life, which is worth bearing in mind if you're planning a holiday to a country with a warm climate. It's also recommended that at regular (monthly) intervals, you allow the battery to fully discharge, before charging it to maximum again.
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