Battery replacements are bread-and-butter shop work — fast, in-demand, and profitable when you do them cleanly. Here is a repeatable process and the pitfalls to avoid.
1. Prep and safety
Power down, remove the pentalobe screws, and warm the edges to soften the adhesive before opening. Always disconnect the battery connector first — a nicked battery is a fire risk.
2. Remove the old battery
Pull the stretch-release adhesive tabs slowly and evenly. If a tab snaps, apply gentle heat or a few drops of high-percentage isopropyl alcohol under the cell to release it — never pry a swollen battery with metal.
3. Fit the new battery
Use a capacity-matched replacement, fresh adhesive strips, and seat the connector firmly. Browse batteries by model — for example iPhone 14, iPhone 13, or the full iPhone parts range.
4. The battery-health warning
On many iPhones, an aftermarket battery triggers an “Unknown Part” or battery-health-unavailable message because the original BMS is paired to the phone. To avoid it, use batteries with a pre-programmed BMS or transfer the original BMS board. Set customer expectations up front either way.
5. Test before you close
Boot, confirm it charges, and check battery health reads correctly. Reseal with fresh adhesive to preserve water resistance. See 5 signs a battery needs replacing to help customers self-diagnose.
