Are you looking to determine how many times you can charge your phone using a Power Bank? Understanding this calculation can help you plan your power usage and ensure that your devices stay charged on the go. In this guide, we'll walk you through the process of calculating the number of phone charges using a simple formula.
The Formula:
(Number of Phone Charges) = (Power Bank Capacity in mAh × 0.85) / Phone Battery Capacity in mAh
Do you want to know the charging times of other devices like your laptop. In our blog “How to calculate the number of device charges using a Power Bank or Power Station” we explain how!
Step-by-Step Instructions:
1. Gather the Necessary Information
Before you start calculating, make sure you have the following information:
- The capacity of your Power Bank in Milliampere-Hours (mAh). This information can usually be found on the product packaging, user manual or online.
- The capacity of your phone battery in Milliampere-Hours (mAh). This information can often be found on the device itself, in its specifications or online.
2. Understand the Variables
- Milliampere-Hours (mAh): This measurement represents the amount of electrical charge a battery can hold and deliver. Milliampere-hours (mAh) is a unit that combines current, measured in milliamperes, with time, measured in hours, to indicate the capacity of a battery. It signifies the quantity of charge the battery can provide over a specific duration before requiring recharging.
- The 0.85 factor used in the formula accounts for various energy losses and inefficiencies that occur during the process of charging a device with a Power Bank.
3. Plug in the Values
Now that you have the required data, you can use the formula to calculate the number of device charges. Plug in the values:
(Number of Device Charges) = (Power Bank Capacity × 0.85) / Device Battery Capacity
Multiply the Power Bank Capacity by 0.85 and then divide the result by the Device Battery Capacity. This will give you the approximate number of times you can charge your device with the power bank.
Example
Let's say you have a Power Bank with a capacity of 10.000 mAh and a phone with a battery capacity of 4.000 mAh.
(Number of Device Charges) = (10.000 mAh × 0.85) / 4.000 mAh
(Number of Device Charges) = 8.500 mAh / 4.000 mAh
(Number of Device Charges) ≈ 2,13
In this example, the power bank can approximately charge the phone 2.13 times.
Additional tips
- Charging experiences may differ from theoretical calculations due to factors like temperature, battery health and power source quality.
- Devices may consume varying amounts of power based on their usage, settings and features being used.
- If you plan to charge multiple phones, sum up their individual capacity in mAh and factor that total into your calculations.
Calculating the number of device charges using this formula can help you make informed decisions about how to best utilize your Power Bank and keep your devices powered up while on the move.
Buyer's favorites
Bestseller
FS5271
Power Bank 67W - 27.000 mAh - Fuel Series 5 - Midnight Black
27.000 mAh - 67W - 2x USB-C + 1x USB-A
€99,95
Large capacity of 27K mAh
With a robust capacity of 27.000mAh, this Power Bank will keep your devices charged all day long. Whether you're travelling, working on-the-go or just on the road, you'll get enough extra energy to get you through the day. This high capacity of 27K mAh is more than enough to fully charge your smartphone at least 5x and your laptop at least once.
Fast-charge your laptop with 67W USB-C PD
This FS5 Power Bank has a super-fast 67W USB-C PD port that lets you quickly charge iPhone and Android smartphones, tablets, laptops and any other compatible device. The Power Bank itself is fully charged within 2.5 hours.
Simultaneous and Pass-through charging with 3 ports
With 3 different ports, you can easily charge multiple devices simultaneously. You use the powerful 67W USB-C PD port for your laptop and the 27W USB-C PD and 18W USB-A ports are suitable for charging your smartphone or earbuds, for example. The pass-through function also makes it possible to simultaneously supply the Power Bank itself and connected devices with new energy!
Suitable for airplane
The battery capacity of 27.000mAh is the maximum capacity you are allowed to take with you in your hand luggage during air travel. So this Power Bank will get through all airport security checks without a problem. Use your phone or tablet during the flight to play a game or watch a film. No worries about dead batteries on arrival!
Durable design
Choosing GRS-certified plastic gives new life to recycled materials. Most of the Power Bank is made of this recycled plastic, helping to ensure a sustainable future. Naturally, this GRS plastic meets Xtorm's highest quality and sustainability standards.
Safe to use
With its advanced safety features, this Power Bank not only protects itself but also all connected devices. Mechanisms that protect against overcharging, overheating and short circuits prevent possible accidents so you can charge your devices worry-free.
Bestseller
FS5201
Power Bank 35W - 20.000 mAh - Fuel Series 5 - Midnight Black
20.000 mAh - 35W - 2x USB-C + 1x USB-A
€69,95
Powerful 20.000mAh capacity
Never run out of battery again! With a robust 20.000mAh capacity, this Xtorm Power Bank ensures you have more than enough power to keep your devices charged throughout the day, whether you're on a road trip, hiking, or simply out and about. There’s more than enough power to fully charge your smartphone at least 4x!Fast Charging with 35W USB-C PDThe Power Bank features a high-speed 35W USB-C Power Delivery (PD) port, ensuring rapid charging for iPhone and Android smartphones, tablets, and other compatible devices. Even the Power Bank itself can be fully recharged in just 3.5 hours!Three Ports for Maximum Versatility Need to charge multiple devices simultaneously? No problem! The Power Bank boasts three ports, including two powerful USB-C PD ports, as well as an additional 18W USB-A port. Now you can charge your phone, tablet, and a camera - all at once.Environmentally Conscious DesignBy choosing GRS certified recycled plastic as the primary material for our Power Bank, we are able to give new life to materials. Diverting plastic from landfills and oceans, that would otherwise take centuries to decompose. Not only does the use of recycled plastic benefit the planet, but it also maintains Xtorm’s high standards of quality and durability.Airplane Proof: Travel with confidence! This Power Bank with a battery capacity of 20.000mAh complies with all airline safety regulations, making it suitable for your carry-on luggage. Stay powered up during long flights and layovers without any hassle.Safety FirstThe Power Bank is equipped with multiple advanced safety features to protect your connected devices, as well as the Power Bank itself. The built-in overcharge, short-circuit, and thermal protection mechanisms safeguard against any potential mishaps, allowing you to charge your devices worry-free.
