How It Works
This calculator helps you estimate how long your devices will last while traveling without access to wall power. The key inputs are your device's battery capacity, your portable battery bank's total capacity, and the device's average power consumption.
Power Consumption Estimates
Smartphones typically consume 300-800 mA/h depending on usage. Tablets use 1000-2000 mA/h. Laptops can use 3000-6000 mA/h. GPS devices use 200-500 mA/h. Camera batteries vary widely by model.
💡 TipAccount for 20-30% efficiency loss in battery banks—actual usable capacity is typically 70-80% of rated capacity due to heat conversion and voltage conversion.