How to Check Battery Health on Android and iPhone - Complete Guide 2026
How to Check Battery Health on Android and iPhone - Complete Guide 2026
Battery health determines how long your phone lasts between charges. Over time, all batteries degrade. Knowing your battery health helps you decide when to replace the battery or upgrade your phone. This guide covers how to check battery health on Android and iPhone.
What is Battery Health
Battery health is measured as a percentage of the original capacity. A new battery has 100% health. After 2-3 years of normal use, battery health typically drops to 80-85%. Below 80%, you will notice significantly shorter battery life.
Apple recommends replacing the battery when health drops below 80%. Android manufacturers suggest similar thresholds.
How to Check Battery Health on iPhone
iPhone has a built-in battery health feature.
Steps:
- Open Settings
- Tap on Battery
- Tap on Battery Health and Charging
- View "Maximum Capacity" percentage
What the numbers mean:
- 100% - New battery, excellent health
- 90-99% - Good health, minimal degradation
- 80-89% - Normal for 2-year-old phone, still usable
- Below 80% - Battery needs replacement
How to Check Battery Health on Samsung Galaxy Phones
Samsung has built-in battery health information, but it's less detailed than iPhone.
Method 1: Samsung Members App
- Open Samsung Members app
- Tap on Support
- Tap on Phone Care
- Tap on Battery
- View battery status (Good, Normal, Poor)
Method 2: Dial code (works on most Samsung phones)
- Open the Phone app
- Dial *#0228#
- View battery information including voltage and temperature
How to Check Battery Health on Other Android Phones (Xiaomi, realme, OnePlus, etc.)
Most Android phones don't have built-in battery health percentages. Use these third-party apps:
AccuBattery (Best Overall)
Steps:
- Download AccuBattery from Google Play Store
- Open the app and grant permissions
- Use your phone normally for a few days
- AccuBattery calculates estimated battery health based on charging cycles
Battery Guru
Alternative to AccuBattery with similar features. Shows estimated battery health after monitoring charging sessions.
Ampere
Shows real-time charging and discharging current. Can estimate battery health based on maximum recorded current.
How to Check Battery Health on Xiaomi Phones (MIUI/HyperOS)
Method 1: Secret Code
- Open Phone app
- Dial *#*#6485#*#*
- Look for "MB_00" - this is your battery's current capacity in mAh
- Look for "MB_06" - this is the original design capacity
- Calculate health: (MB_00 ÷ MB_06) × 100 = battery health percentage
How to Check Battery Health on realme and OPPO Phones
Method: Realme/Oppo diagnostics
- Dial *#899# (realme) or *#*#3646633#*#* (OPPO)
- Navigate to Battery or Debug information
- View battery capacity and health status
Understanding Battery Cycles
A battery cycle is one full discharge from 100% to 0%. Lithium-ion batteries are rated for 300-500 cycles before dropping to 80% health.
Cycle count reference:
- 0-100 cycles: 95-100% health
- 100-200 cycles: 90-95% health
- 200-300 cycles: 85-90% health
- 300-500 cycles: 80-85% health
- 500+ cycles: Below 80% health
Tips to Maintain Battery Health
Don't Drain to 0%
Keep your battery between 20% and 80% for longest lifespan. Avoid regularly draining to 0%.
Don't Leave at 100% for Long Periods
Leaving your phone plugged in at 100% for hours (like overnight) slightly reduces lifespan. Most modern phones have features to limit charging to 85% for battery preservation.
Avoid Heat
Heat is the biggest enemy of battery health. Don't leave your phone in direct sunlight, in a hot car, or on your car dashboard. Remove the case while charging if the phone gets hot.
Use Original Chargers
Quality chargers provide stable voltage and current. Cheap chargers can damage battery health.
Enable Battery Saver Features
Use your phone's built-in battery saver features. Many Samsung phones have "Protect Battery" that limits charging to 85%.
When to Replace Your Battery
Consider battery replacement when:
- Battery health drops below 80%
- Phone dies at 20-30% remaining
- Phone needs charging 2-3 times per day
- Phone randomly shuts down even with battery remaining
Battery Replacement Cost in Bangladesh
Samsung: Official battery replacement costs 1,500-3,000 BDT depending on model
iPhone: Official battery replacement costs 3,000-6,000 BDT depending on model
Xiaomi/realme/Infinix/Tecno: 1,000-2,500 BDT at authorized service centers
When to Buy a New Phone Instead of Replacing Battery
If your phone is more than 3 years old and battery health is below 70%, consider buying a new phone instead of replacing the battery. A new phone will have better performance, longer battery life, newer features, and full warranty.
Best New Phones with Excellent Battery Life
- Samsung Galaxy A06 - 14,499 BDT - 5000 mAh battery
- Infinix Note 60 - 19,990 BDT - 5000 mAh with 45W charging
- Samsung Galaxy A16 5G - 24,999 BDT - 5000 mAh with 5G
Where to Buy Phones with Battery Health Warranty
mobile.com.bd sells new phones with 100% battery health and full manufacturer warranty.
Frequently Asked Questions
Question 1: Is it normal for battery health to drop 5% in one year?
Answer: Yes, 5-10% degradation per year is normal with typical usage.
Question 2: Does fast charging damage battery health?
Answer: Modern phones manage heat and current to protect the battery. 25W-45W charging is safe. Very high speeds (100W+) may cause slightly faster degradation.
Question 3: Can I replace the battery myself?
Answer: We recommend official service centers. DIY battery replacement can damage your phone and voids warranty.
Question 4: Do new phones come with 100% battery health?
Answer: Yes, new phones from mobile.com.bd have 100% battery health.