When you feel that your smartphone battery is no longer working as it should, please don’t wait for it to swell and damage your mobile phone. In extreme cases, a damaged or swollen battery can explode, not only damaging your phone but also seriously burning nearby people. At Phones Rescue, we have professional Apple iPhone battery testers and testers for charging circuits.

iPhone battery replacement – One-hour testing and repair (phonesrescue.co.uk)