iPhoneiPadFix
Guides
Tools
Find Guide
Cost Calc
Battery Tool
iPhone Battery Calibration Tool
Recalibrate your iPhone battery + extend lifespan with personalized plan in 60 seconds.
⚡ Battery health + age + usage → calibration + lifespan plan
iPhone age
Under 1 year
1-2 years
2-3 years
3-4 years
4+ years
Current battery health %
100% (new / pristine)
95-99% (excellent)
90-94% (good)
85-89% (acceptable)
80-84% (degraded)
70-79% (replace soon)
Under 70% (replace NOW)
Daily iPhone usage
Light (under 2hr screen time)
Moderate (2-5hr)
Heavy (5-8hr)
Extreme (8+ hr — gaming, streaming)
Charging habits
Overnight charging (most common)
Multiple top-offs daily
Drain to 0%, charge to 100%
Optimized 80% Limit (iPhone 15+)
Battery symptoms
No issues
Fast drain (loses charge quickly)
Random shutdown (under 20%)
Slow charging
Incorrect % display
Phone gets hot during use
Build Calibration Plan →