Battery charging time
Calculation based on capacity, power and system efficiency
Need to charge more:
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Charge: 20% → 100%
Required energy: -
Effective power: -
Charge in an hour: -
Phone charging time
🔋 How long to wait until fully charged?
Our calculator helps you plan your time so you don't have to sit at the power outlet for an extra hour. It takes into account not only the battery capacity, but also the efficiency of the process (part of the energy is lost to heating).
📝 How to get an accurate result:
Больше по теме: Time
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- Capacity (mAh): Look at the phone's specifications (the standard now is 4000–5000 mAh).
- Power (W): Written on the power supply. If not, multiply Volts (V) by Amps (A).
Why count this?
- Extend battery life: Experts recommend keeping the charge in the range of 20-80%. The calculator will tell you how many minutes to charge your phone in order to turn it off at 80%.
- Checking the charger: If the calculator shows 1 hour, but the phone takes 3 hours to charge, your cable is probably of poor quality or the power supply does not produce the declared power.
- Planning: Calculate whether you will have time to recharge before leaving. For more complex calculations of intervals, use our section time calculators.
Frequently asked questions (FAQ)
🔹 Where can I see the charging power (Watts)?
Inspect the charging unit case (small text). Look for a number with the letterW(for example, 33W, 65W). If only Volts and Amps are given (for example, 5V and 2A), multiply them: 5 × 2 = 10 W.
🔹 Why does the phone take longer to charge than the calculation showed?
Speed is affected by 3 factors:
- Usage: If the screen is on or the navigator is running, charging is slower.
- Temperature: If the phone gets hot, the controller will reduce the current so as not to damage the battery.
- Slowdown at the end: The last 10-15% (from 85% to 100%) always charges very slowly ("trickle charging").
🔹 Which charging mode is the most useful?
Lithium-ion batteries “like” to be between 40% and 80%. Try not to completely discharge your phone or leave it on charge all night. You will find other useful tools in our catalog all calculators.