What does Battery Health Degraded mean?
Battery capacity has degraded below optimal level, OR non-genuine/non-paired battery installed triggering health reporting lockout.
Common causes
- Battery natural degradation over 300-500 charge cycles
- Non-genuine replacement battery
- Battery not paired to device (requires DCSD cable or Apple Business Essentials)
- High temperature exposure degrading cells
Diagnostic & testing steps
- 1. Go to Settings > Battery > Battery Health
- 2. If 'Service Recommended' shown - capacity is below 80%
- 3. Check charge cycle count if accessible
- 4. If health is unknown/unverified: battery pairing required via Apple tool
- 5. Replace battery if below 80% or showing degraded peak performance
Tools required
- Pentalobe screwdriver
- Tri-wing screwdriver (Y000)
- Battery adhesive strips
- Heat gun
- DCSD cable (for pairing)
OEM parts & part numbers
Battery
Part numbers: 661-20199, 661-16578, 661-18055
Safety warning
⚠️ Li-ion fire hazard: heat battery adhesive gradually, never flex or puncture battery. Dispose at certified e-waste facility.
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