How Long Will Your Phone Battery Last While Traveling?
Running GPS navigation, posting to social media, and streaming video drains your battery far faster than normal use. Knowing your expected battery life in advance lets you decide whether to bring a powerbank.
For example, a 4,500 mAh phone used all day with GPS, social media, and high brightness may last only 3–4 hours. For a 10-hour day out, that means you'll need a powerbank with at least 10,000 mAh capacity.
The figures in this calculator are estimates based on typical smartphone current draw. Actual battery life varies by device model, apps running in the background, and network signal strength.
Frequently Asked Questions
Lower screen brightness is the single biggest impact. Switching to power-saving mode, disabling background app refresh, and using offline maps can together double your effective battery life vs. full-power use.
Most airlines allow powerbanks in carry-on baggage, but not in checked luggage. TSA and most international regulators allow up to 100 Wh (about 27,000 mAh). Check your airline's specific rules before flying.