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Branded Power Bank Performance Calculator
Compare charging performance of popular power banks from Anker, UGREEN, Baseus, Xiaomi, Belkin, DunVera and other brands with popular smartphones and USB-C laptops.

1. Select Power Bank

Enter the actual maximum output available from your power bank. Use the manufacturer's single-port rating when checking one device.

2. Select Device

For phones, enter battery energy directly in Wh if using a custom device. For laptops, use the battery energy specified by the manufacturer.
Laptop charging time can be much longer while the laptop is being used. Some incoming power is consumed by the laptop instead of charging its battery.

3. Charging Range

Estimated Performance

Actual Charging Power --
Estimated Charging Time --
Device Battery Energy --
Estimated Full Charges --
Select a power bank and device, then calculate.

Device Performance Comparison

Select a device type to see available models.

Power Bank Model Comparison

Select a power bank and calculate performance.

How This Calculator Estimates Performance

Power bank capacity is converted to usable energy rather than treating the printed mAh rating as directly transferable to a phone or laptop.

Actual charging power is limited by the lower of the power bank's available output and the device's maximum supported wired input.

Conversion losses, charging efficiency and charging taper are included in the estimate. Actual results vary with temperature, cable quality, charging protocol, battery condition, software and device usage.

Compare Power Bank Charging Performance

Power bank capacity alone does not tell you how quickly a phone or laptop will charge. A 20,000mAh power bank with 100W output can behave very differently from a 20,000mAh model limited to 20W or 30W.

This calculator compares popular power bank models from brands such as Anker, UGREEN, Baseus, Xiaomi, Belkin and DunVera with popular mobile phones and USB-C laptops.

Select the exact power bank model, select your device, choose the starting and target battery levels, and the calculator estimates actual charging power, charging time and approximate full-charge count.

Important

These are engineering estimates, not guaranteed charging times. Manufacturer charging protocols and regional product variants can change. A power bank may also require a compatible USB-C cable and charging protocol such as USB Power Delivery or PPS to reach its advertised output.