The Digester

I swapped the battery on an iPhone 6 with an iFixit kit in about an hour; here are the costs, safety tradeoffs and when DIY makes sense versus using Apple or a service.

Phone batteries age and can cause throttling, unexpected shutdowns, or reduced runtime.
Apple's official battery service was about £49 in the UK while an iFixit DIY kit cost about £35 including postage in this case.
DIY replacement took roughly an hour with the right tools but will void warranty and requires care and patience.
Heating adhesive and prying out old batteries carries puncture and fire risks, so follow detailed guides and safety precautions.
For older, low-value phones DIY can be cost effective, while newer or primary phones are safer to service through Apple or authorized providers.

I Replaced an iPhone Battery at Home: Cost, Risk and When It Makes Sense

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