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Battery Life Converter
mAh · Watts · Hours — estimate how long your devices will last
V (volts)
Estimated Battery Life
13.3 hours
📱 Smartphone: ~13.3 hours of continuous use
🔋 Total Energy
14.8 Wh
⚡ Device Draw
5.0 W
📅 Days (8hr/day)
1.7 days
📱 Common Device Battery Capacities
Smartphone
3,000-5,000 mAh
Large Phone
5,000-6,000 mAh
Laptop
40-100 Wh
Power Bank
10,000-20,000 mAh
E-Bike
300-500 Wh
Car Battery
40-80 Ah
⚡ Device Power Consumption
📱 Phone (idle)0.1-0.5W
📱 Phone (screen on)2-6W
💻 Laptop (light)10-20W
💻 Laptop (gaming)60-150W
📺 TV (55")80-150W
💡 LED Bulb5-12W
🎧 Wireless Earbuds0.05-0.1W
⌚ Smartwatch0.05-0.2W
⚡ Estimated Charging Time
W
⏱️ Estimated charge time:
~49 minutes
💡 Battery Health Tips
🔋 Keep between 20-80% for longest life
🌡️ Avoid extreme temperatures
🔌 Don't leave plugged in at 100% constantly
⚡ Use certified chargers only
🔋 mAh ↔ Wh ↔ Ah
⚡ Power consumption
📱 Device runtime
⚡ Charging time