iPhone 15 Series Batteries

Replacement Batteries — wholesale buying guide (iPhone 15 to iPhone 15 Plus)

The label is marketing; the real tests are incoming capacity, cycle life and the protection circuit. If capacity is not measured at intake, a padded label will find its way to your bench. Safety rides on the protection board, so it is the part worth inspecting before you buy volume. A battery for iPhone 15 is judged on measured capacity, not the label — we publish the tested mAh rather than the claimed figure.

Cycle life is the number most suppliers avoid publishing, because a cheap cell looks identical on day one and falls away by month six.

Specs and checks that matter

• Cycle life: A genuine cell holds usable capacity markedly longer than a re-wrapped copy
• Grade scale: Original, OEM high-copy, aftermarket, refurbished — the grade sets cycle life, not the price
• Capacity claim: Rated mAh on the label and measured mAh on a tester are often different figures
• Compliance: UN38.3 test summary and MSDS travel with every cell — these are what air freight asks for
• Protection: PCM/BMS board and, on some models, a TI gauge chip sit on the cell

Buyer questions

What is the right way to store batteries?

Room temperature, partial charge, oldest stock out first — heat and full charge are the two shelf-life killers.

Which battery grade should I stock?

Most repair shops run OEM high-copy as the default and keep a small original line for picky customers or warranty work.

How do I check a battery before it goes in a phone?

Measure open-circuit voltage, check connector position and cell dimensions, and confirm 0-cycle stock has not been sitting for a year.

Will the battery show an unknown-part warning?

The correct part number and a compatible fuel-gauge chip keep the warning away on supported models — ask us which models are sensitive.

Related in this range

• iPhone 15 Clear tempered glass
• iPhone 15 Pro cases
• iPhone 15 back covers
• All phone repair parts & batteries