iPhone 12 Series Batteries

Replacement Batteries — wholesale buying guide (iPhone 12 to iPhone 12 Pro)

A replacement battery is judged on honest capacity, cycle life and the protection board — not on the number printed on the label. Capacity should be measured on incoming inspection rather than copied from the supplier label, because padded labels are the single most common complaint here. Original cells match the factory part; OEM high-copy cells use good components at a lower cost; aftermarket is the budget tier; refurbished cells are recovered and should be flagged. Batteries are classified goods for air freight, so UN38.3 documentation has to be ready before the carton moves.

Battery is a trust category: the customer cannot see the difference at the counter, so it is the grade and the measured capacity that decide whether they come back.

Specs and checks that matter

• Capacity claim: Rated mAh on the label and measured mAh on a tester are often different figures
• Protection: PCM/BMS board and, on some models, a TI gauge chip sit on the cell
• 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
• Compliance: UN38.3 test summary and MSDS travel with every cell — these are what air freight asks for

Buyer questions

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.

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.

What does the quality grading mean for batteries?

Original cells match the factory part; OEM high-copy uses good components at lower cost; aftermarket is the budget tier; refurbished cells are recovered and flagged.

What shipping documents come with battery orders?

UN38.3 test summaries and MSDS are available for every battery line so your forwarder can move the shipment without a hold-up.

Related in this range

• iPhone 12 Clear tempered glass
• iPhone 12/12 Pro cases
• iPhone 12 back covers
• All phone repair parts & batteries