Galaxy S23 Ultra
The source for Galaxy S23 Ultra gives 18.83 Wh and 4,855 mAh. The manufacturer's typical capacity of 5,000 mAh is listed separately.
Battery size does not determine charging speed. Check the charging protocol too.
How many phone charges?Battery figures and power-bank examples.ViewClose+
The Galaxy S23 Ultra battery stores 18.83 watt-hours.
The calculations below use the model-specific figure of 4,855 mAh. The typical figure of 5,000 mAh is shown separately and is not silently mixed with the stated capacity.
- Stated energy
- 18.83 Wh
- Stated capacity
- 4,855 mAh
- Typical capacity
- 5,000 mAh
- Nominal voltage
- 3.88 V
How many full charges?
We take 75% of the power bank's stated Wh and divide by this phone's 18.83 Wh. This remains a planning estimate.
18.5 Wh rated → 13.9 Wh planned delivery
37 Wh rated → 27.8 Wh planned delivery
74 Wh rated → 55.5 Wh planned delivery
(Power-bank Wh × 0.75) ÷ 18.83 WhA 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 assumptionsCharging speed and sourcesWhat the phone, charger and cable must support.ViewClose+
18.83 Wh tells you how much energy.
Charging power tells you how fast.
The phone, adapter and cable must support the required charging profile.
Alignment, heat and certification affect actual power.
Two sources with different roles.
The manufacturer supports the phone and charging claims. The model-specific battery source supplies the battery figures used in our calculation.
Questions and comparisonsMore explanation and other phones.ViewClose+
Keep energy and charging power separate.
How many Wh does the Galaxy S23 Ultra battery store?
The model-specific source gives 18.83 Wh and 4,855 mAh. Watt-hours are the useful basis for comparison with a power bank.
How often can a 10,000mAh power bank charge the Galaxy S23 Ultra?
A power bank rated around 37 Wh provides about 1.5 full charges in this estimate. We assume 75% of its rated energy reaches the phone battery.
Does 18.83 Wh mean the phone charges at 18.83 W?
No. Wh is stored energy; W is charging power at a particular moment.