Third party parts void your manufacturer’s warranty, and our technicians here at MacMan may have to decline service if you have third party parts installed. This isn’t an intellectual property issue; it’s a safety issue. Third party parts can cause issues with other certified parts due to poor manufacturing standards or installation, and certified parts go through layers of checks and quality assurance that third party parts just don’t. This is especially true for third party batteries, which may cause damage to the phone and injury to the user.
At MacMan we always use certified manufacturer parts in all of our service repairs because your safety always comes before budget.