Your recharge plan

Selected devices2 device types
iPhone13 Wh per recharge - USB-C PD or USB-C to Lightning
AirPods / earbuds case3 Wh per recharge - USB-C or wireless case cable

Values are typical battery sizes with a practical conversion loss and reserve. For laptops, output wattage matters as much as capacity.

Recommended battery

14,000 mAh
Shopping class20,000 mAh class
Equivalent capacity50 Wh
Device energy32 Wh
Minimum output20 W
mAh basis3.7V nominal
Laptop readyNot required

Selected devices

  • iPhone x 226 Wh
  • AirPods / earbuds case x 26 Wh

Recommended picks

Recommended power banks for this setup.

Use these cards as a practical starting point after reading a guide or using a calculator. Check capacity, power, features and price before opening the merchant page.

Buying shortcut

From sizing to a realistic shortlist.

Use the calculator to avoid buying too small, then compare product picks with the right capacity, output power and use case in mind.

Frequently asked questions

Why does output wattage matter for laptops?

A power bank can have enough capacity but still charge a laptop slowly or not at all if the USB-C PD output is too weak. Many laptops need 45W, 65W or 100W.

Why are the device values approximate?

Phone, laptop and accessory batteries vary by model. The presets use practical averages so shoppers can quickly choose a sensible product range.

What is a good reserve margin?

A 20% reserve is a practical default because conversion losses, cable quality and battery aging reduce usable energy.

Can I use mAh instead of Wh?

Wh is better for comparing power banks across phones and laptops. mAh can be misleading because it depends on voltage.

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