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What is mAh and How to Choose the Best Power Bank Capacity for Your Needs?

Feb 11, 2025

What is mAh and How to Choose the Best Power Bank Capacity for Your Needs?

mAh is a crucial factor in determining the right capacity for your power bank, but how do you know what’s right for you? Should you go for a 10000mAh or 20000mAh model, and does a higher mAh really make a difference? Let’s break it down and help you choose the best power bank for your needs.

What is mAh and Why Does It Matter?

mAh stands for milliampere-hour and is the standard unit of measurement for a battery’s capacity. Simply put, the higher the mAh number, the more energy the battery can store, and the longer it can power your device. A higher mAh capacity means more charging power and longer usage times for your devices.

Understanding mAh is essential to determine how long your power bank will last and how many times it can charge your devices. Here's a list of battery capacities for some popular devices for your reference and to compare the power requirements of different devices:

 Device Category Battery Capacity (mAh)
Smartphones (e.g., iPhone, Samsung Galaxy) 2500 mAh - 4500 mAh
Tablets (e.g., iPad, Samsung Galaxy Tab) 5000 mAh - 8000 mAh
Smartwatches (e.g., Apple Watch) 1200 mAh - 3100 mAh
Wireless Earbuds (e.g., AirPods, Samsung Galaxy Buds) 60 mAh - 522 mAh (charging case capacity varies)
Cameras (e.g., DSLR, Mirrorless) 800 mAh - 2500 mAh
Laptops/Computers 30000 mAh - 60000 mAh
Drones (e.g., DJI, Mavic, Phantom) 1000 mAh - 6000 mAh
Game Consoles (e.g., Nintendo Switch, PS Vita) 2000 mAh - 5000 mAh

How Much mAh Do I Need in a Power Bank?

Now that you know what mAh is, how do you decide which capacity works for you? The answer depends on your usage patterns and the types of devices you need to charge. Here’s a breakdown to help you find the ideal capacity:

  • Under 10000mAh: This size is great for light users who only need to charge their phone 1-2 times per day. It’s also perfect for smaller devices like smartphones, wireless earbuds, smartwatches, or a handheld game console (e.g., Nintendo Switch Lite). These devices typically have lower power consumption, and a 10000mAh power bank will provide enough juice for 1-2 full charges. The INIU Carry P50-E1 (10000mAh & 45W) is perfect for daily use, offering a slim and portable design that easily fits in your pocket or bag without taking up much space.
  • 15000-20000mAh: Perfect for medium usage—ideal for business trips or traveling when you need to charge your phone 2-3 times. This range is also great for devices like smartphones, tablets, wireless earbuds, and smartwatches, as well as occasional laptop use. If you're charging a smartphone or tablet, a 15000-20000mAh power bank will keep your devices running throughout the day. The INIU Carry P51-E2 (20000mAh & 22.5W) provides a high capacity while remaining sleek and easy to carry, offering an ideal balance between power and portability for most people.
  • Above 25000mAh: For high-demand users, like those who travel extensively or need to charge multiple devices simultaneously, a 25000mAh or higher power bank is perfect. This capacity is ideal for laptops, cameras, drones, or gaming consoles (like the Nintendo Switch or portable gaming devices). These devices consume more power, especially when used heavily, so a high-capacity power bank ensures you stay powered up on long trips. The INIU Cougar P63-E1 (25000mAh & 100W) is designed to charge multiple devices at once and provide extended battery life, making it the ultimate choice for long trips or group travel where everyone needs power.

mAh and Size: Bigger Capacity Doesn’t Always Mean a Bigger Power Bank

One common misconception is that a high capacity power bank will be too large and difficult to carry. However, increasing mAh doesn’t necessarily mean a power bank will be heavy or bulky. Thanks to advanced battery technology, many companies, including INIU, have successfully designed high-capacity power banks with a compact form.

For instance, INIU’s Smallest&Slimmest Series power banks are engineered to be lightweight and portable, so you don’t have to sacrifice size for power. These small power banks with high mAh are ideal for users who want extended battery life without the weight or size of traditional, larger models.

How to Choose the Right Power Bank Capacity? 5 Simple Steps to Help You Decide

To help you make the right decision, here are five simple steps for choosing the best power bank capacity for your needs:

  1. Determine the devices you need to charge: List the devices you regularly charge, such as your phone, tablet, or wireless earbuds, and note their battery capacities.
  2. Understand your charging frequency: How often do you need to charge your devices? If you’re out and about for long hours, you may need a higher capacity.
  3. Consider portability and weight: If you need a small power bank with high mAh, look for models that offer lightweight designs without compromising on power.
  4. Compare different capacities: Once you know how often and what devices you’re charging, compare 10000mAh, 15000mAh, and 20000mAh models to find the best balance between power and size.
  5. Check the brand and quality: Make sure to choose a reputable brand that guarantees performance, like INIU, known for its reliable and durable power banks.

A well-chosen power bank can eliminate that constant fear of your phone running out of juice during the day, whether you’re at work, traveling, or simply out for a walk.

At INIU, we offer a range of high capacity portable power banks designed to keep you powered up without the bulk. Whether you need a 10000mAh ultra-slim power bank for daily use or a 20000mAh power bank for travel, there’s an INIU product that fits your needs perfectly.

Choosing the right power bank allows you to say goodbye to battery anxiety and enjoy the peace of mind that comes with knowing your devices will always be charged when you need them the most.