An iPhone battery lifespan depends on usage, but here’s a breakdown:

1. Daily Battery Life (Per Charge)

• New iPhones: 10–15 hours of normal use (browsing, texting, calling).
• Older iPhones: 6–10 hours depending on battery health and usage.
• Heavy use (gaming, video streaming): 4–8 hours.

2. Battery Lifespan (Years Before Degradation)

• Apple rates iPhone batteries to retain 80% capacity after 500 charge cycles (roughly 1.5–2 years of daily charging).
• After 2–3 years, most users notice shorter battery life.
• After 4–5 years, a battery replacement is often needed.

3. How to Check Battery Health

Go to Settings > Battery > Battery Health & Charging:

• 100%–90%: Excellent condition.
• 89%–80%: Still good but may drain faster.
• Below 80%: Consider replacing the battery.

4. How to Extend Battery Life

• Use Low Power Mode when needed.
• Avoid extreme temperatures (heat speeds up battery wear).
• Charge between 20–80% (avoid full 0-100% cycles too often).
• Update iOS regularly for efficiency improvements.