The MacBook Pro Retina 15-inch Mid 2015 (A1398) uses a large-capacity lithium-polymer battery (~99.5Wh) adhered directly to the upper case (C-side).
Over time, the battery may suffer from degradation, false charge readings, “Service Battery” warnings, failure to charge, or unexpected shutdowns.
The replacement is a high-grade OEM battery with smart controller IC, fully compatible with Apple’s SMC, charger, and macOS battery management.
The replacement process involves partial disassembly of the logic board and trackpad to safely remove the battery using professional solvent or heat-based tools.
Service time is typically 1–2 hours, and the battery comes with a 6–12 month technical warranty with post-repair support for calibration or charging issues.