That means I could twist my phone sideways into landscape mode and use the Baseus power bank as a portable stand for Apple's new StandBy mode, which is one of my favorite features on iOS 17, and certainly the one I use the most often. Power bank capacities are rated in milliamp-hours (written as mAh), which is a measurement of charge that’s sometimes referred to as current flow over time. So how many milliamp-hours do you need? Additionally, it’s worth mentioning that using a power bank’s full capacity in one go can lead to a shorter lifespan and reduced overall performance of the power bank over time. It’s advisable to use the power bank intelligently, considering how much charge you actually need and recharging the power bank before it completely drains to prolong its lifespan. You don't have a magnetic phone: You don't need an iPhone to enjoy the magnetic charging, but you'll need a case that lines up your phone with Apple's MagSafe wireless configuration, or else your phone won't charge properly. Power bank users with special requirements or for certain scenarios will find that 7,000–10,000 mAh is a viable alternative. And definitely get a 10,000+ mAh power bank for your tablet or laptop. To meet your different needs, Anker offers you a list of power banks of various capacities, get your own Anker power bank here. FAQ 1. What's a Good Amount of mAh for a Portable Charger?

When using a power bank, it’s important to understand that not all the energy stored in the power bank’s battery can be efficiently transferred to the device being charged. There are inherent losses in energy conversion and transmission, leading to a reduction in the overall charging capacity. This is known as conversion losses or energy efficiency. By taking into account the conversion losses, efficiency, and device capacity, you can estimate the charging capacity of a 4000mAh power bank and have a clearer understanding of how long it can last in real-world usage scenarios.All of our tests were conducted using the same wall adapter and, when possible, USB-C or Micro-USB cable. This was done to eliminate any discrepancies with wall adapters and cable throughput. What to look for in a portable power bank In fact, our testing confirms what battery makers usually claim. A battery maker will claim between 60% and 70% efficiency, so that 10,000mAh battery will only give your phone around 6,000mAh of extra battery charge, at the least. In practice we find around 65% efficiency, though occasionally we can do even better.

A. Power bank charging times vary depending on the power bank’s capacity – larger batteries take longer to charge – as well as the type of power adapter. Some power banks use USB cables for power, while others come with AC adapters that plug into the wall. Not surprisingly, charging from the wall is faster. If you have a newer Android phone, or the latest iPhone 15 models, you'll want a power bank with faster charging speeds to get your battery full faster. Charging speed is measured in wattage, and the iPhone 15 can charge just a bit faster than 15W, while the Galaxy S23 Ultra can charge up to 45W. Recharge the Power Bank Regularly: Keeping your power bank charged is essential for its longevity. Recharge it as soon as possible after use, rather than letting it fully drain, to prevent wear on the battery cells. These typical charging times give you an idea of how long a 4000mAh power bank can last in terms of providing charges or extending the usage time of various devices. By considering the charging times and the capacity of your devices, you can better plan the usage of your power bank and ensure your devices are always powered up when needed. Considering these conversion losses and other factors, it’s important to be aware that the actual usage and charging capacity of a 4000mAh power bank may be slightly lower than its specified capacity. However, even with these losses, a well-maintained and efficient 4000mAh power bank can still provide multiple charges for your devices.Speaking of that wall plug, it's the most useful feature ever on a power bank. Some power banks come with a built in USB-C cord, but this Anker comes with a two-prong power outlet plug. That makes it a wall charger as well as a power bank, and the utility can't be understated. Device Battery Capacity: The capacity of the device being charged plays a crucial role in determining the number of charges a power bank can provide. A device with a larger battery capacity will require more power, resulting in fewer charges from a 4000mAh power bank. For example, a device with a 3000mAh battery will likely get around one full charge from a 4000mAh power bank, considering some power loss during charging. EnergyCell’s portable charger is as basic as power banks get, with just a micro-USB input, a USB-A output and no support for any fast-charging standards. What’s more, it’s slow. The USB-A output is specified as 10W, but in our tests we measured the output at between 7W and 9W depending on the phone. A 15-minute charge only raised the level on our test smartphone by 7%. However, in reality, due to conversion losses and other factors, the actual charging capacity may be lower. A conservative estimate would be to assume an efficiency of around 80% for most power banks, resulting in an effective capacity of approximately 3200mAh (4000mAh x 0.8 = 3200mAh).

Moreover, external factors such as temperature can also affect the power bank’s energy efficiency. Extreme heat or cold can impact the power bank’s performance and reduce its overall charging capacity. These portable power banks are popular among phone users for a good reason—they offer enough capacity. They are also quite lightweight and easy to carry. Use High-Quality Charging Cables: Invest in high-quality charging cables and connectors that are compatible with your power bank and devices. Cheap or damaged cables can result in slower charging speeds and energy loss. With capacities between 2500mAh and 10000mAH, you can feel confident that our power banks will be able to fully charge your devices hour after hour. Shop High Quality Power Banks with Special Features

Power bank capacities

If the power bank you buy doesn’t include a case, buy one. Power bank cases are great for carrying USB cables and keeping your charging ports clean and free from dust. Power bank capacities There are plenty of combination power bank and some other device, but the Tylt Bottle 2 actually makes sense because we're usually carrying an insulated water bottle anyway, so we might as well screw a battery onto the bottom. With a 5,700mAh capacity, the Tylt Bottle 2 is just enough to get us through a very busy day, or keep the phone powered while we play games at the cafe.