TOPIC
Power & battery
Estimate how long stored energy or fuel can run equipment, or how far it can take you.
3 official calculators
Power & battery
How many times can a power bank charge my phone?
Estimate how many times a 10,000mAh or 20,000mAh power bank can charge an iPhone or Galaxy after voltage conversion, cable, wireless, and battery-condition losses.
Power bank capacity · Phone battery capacity · Conversion efficiencyCalculatePower & batteryHow long can a battery run my equipment?
Estimate battery runtime for a UPS, refrigerator, laptop, CCTV system, or other equipment using capacity, power draw, losses, and battery health.
CalculatePower & batteryHow long will my fuel last, or how far can I drive?
Estimate generator runtime or remaining vehicle range from current fuel, hourly consumption or recent economy, reserve fuel, and a safety margin.
CalculateUseful for
- Plan for an outage
- Plan power for a camping trip
- Estimate driving range on remaining fuel