MacBook Battery A1321 - OEM Quality For 15-Inch MacBook Pro
MacBook Battery A1321 - OEM Quality Delivers A Direct-Fit Power Replacement For MacBook Pro 15-Inch A1286 Systems From Mid 2009 And Mid 2010. You Get Stable Runtime, Precise Fuel Gauge Reporting, And A Board Connector That Matches The Original Layout For Quick Bench Turnaround.
The Pack Uses Lithium-Polymer Cells Tuned For Consistent Discharge And Low Ripple, Sleep, Wake, And Load Spikes Remain Predictable. The Integrated Protection Circuit Handles Overcharge, Over-Discharge, Overcurrent, And Short-Circuit Events To Safeguard The Logic Board And Cells During Daily Use.
Technical Data And Compatibility Details
Nominal voltage: 10.95 v. Typical capacity: 73 wh. Chemistry: lithium-polymer. Form factor: unibody internal pack with fixed flex and board connector. Estimated cycle life: up to 1000 charge cycles under normal usage patterns. Compliance: ce and rohs. Operating temperature: 0–35 °c typical. Storage guidance: store at 40–60% state of charge in a cool, dry environment when not in use for extended periods.
Compatibility: macbook pro 15-inch unibody a1286 (mid 2009, mid 2010). Apple battery model: a1321. Related apple part numbers commonly referenced in service guides: 661-5211 and 661-5476. Supported use cases include retail repairs, corporate fleet refresh, and device refurbishment where original runtime has degraded or cells have swollen.
Installation Notes For Repair Shops
Average bench time is 15–30 minutes with an experienced technician. You will typically use a phillips #00 driver for the bottom case and a tri-wing y0 driver for the battery screws on many a1286 revisions, plus a spudger for safe connector release. You should power down, unplug the adapter, discharge static, and disconnect the battery before touching any board components.
You should inspect for swelling that may stressed the trackpad or top case and replace any deformed parts before reassembly. You should perform an smc reset after installation, then update macos battery reporting by charging to 100%, resting on ac for at least two hours, and running a full discharge and recharge to calibrate the gauge.
Performance, Care, And Best Practices
You Can Expect Runtime That Aligns With Original Mid 2009–Mid 2010 15-Inch Profiles When Paired With A Healthy System And Original Charger. You Should Avoid Discharges To 0% As Routine, Keep Vents Clear, And Maintain Macos Updates To Ensure Accurate Power Management And Thermal Control.
You Can Extend Service Life By Keeping Average Charge Between 20–80% During Storage, Avoiding Excess Heat, And Cycling The Pack Periodically On Fleet Units That Sit On The Shelf. You Should Recycle The Old A1321 Through An Approved Stream, And You Should Document Cycle Count And Health Metrics In Your Work Order For Transparent Aftercare.
The battery is covered with a 1-year product warranty. The warranty does not cover man-made damage or wear and tear. To be used with MacBook model number: A1286
