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Same power bank. How many full charges?

Compare two phone batteries and estimated charges from the same 37Wh power bank. Wh describes stored energy; W describes charging power.

Technical references for the documented source models. The exact Philippine handset revision, battery part and bundled charger are not verified. Source record dates remain visible; these pages do not establish local stock or sales.

Side-by-side calculator

Choose two exact models.

The 10K estimate assumes a 37Wh-rated power bank and 75% end-to-end delivered energy. It is a planning figure, not a charging guarantee.

First phoneSecond phone

From the same 37Wh power bank

≈ 2.1full chargesApple iPhone 15

≈ 1.4full chargesGoogle Pixel 9a

Apple

iPhone 15

Battery energy: 12.98Wh
Rated capacity: 3,349mAh
From a 10K power bank: ≈ 2.1full charges

Wired chargingFast-charge capable with a 20W or higher USB-C adapter

Google

Pixel 9a

Battery energy: 19.5Wh
Rated capacity: 5,000mAh
From a 10K power bank: ≈ 1.4full charges

Wired chargingFast USB-C charging; use a compatible USB-C charger

A cold or older battery can supply less energy.

Cold and battery ageing

The estimate uses the battery data and calculation assumptions shown with this result. That is not a measurement of the battery’s current condition. Cold and battery ageing are not calculated separately.

Cold is not the same as wear. Cold can temporarily limit the available energy and the power that can be delivered. Ageing can permanently reduce the storage capacity, even when the screen shows ‘100% charged’.

Follow the temperature limits for charging and using from the manual of your model. Check important applications with your own setup.

More about our battery assumptions