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What power bank capacity do I need?

The power bank capacity is stated in milliampere hours (mAh) and shows how much power it can store. However, the actual capacity available is lower due to internal losses (e.g. due to the development of heat during charging). The reduced mAh value of the power bank and the capacity of the mobile device you want to charge determine whether or how often you can fully charge your smartphone, tablet or laptop.

Power bank charges smartphone

Connection: What should you bear in mind?

A power bank has a charging input (Micro-USB or USB-C socket), via which you can charge the power bank when it is empty, and a charging output with USB-C and/or USB-A sockets to charge a mobile phone and the like. Large power banks have multiple outputs to simultaneously charge several devices, while small power banks often get by with just one USB-C connector, which serves as the input and output. There is no need to insert the cable if you charge your smartphone wirelessly with a Hama power pack for inductive charging. Which power bank connectors you need depends on how fast you want to charge, which charging cables you use and how many devices you want to charge simultaneously.

The different USB connectors

USB-C connection

High charging speeds can be achieved with a USB-C connector as a charging output and input – both when charging your mobile devices and when charging the power bank. Hama power packs with USB-C connector

Micro-USB port

Most power banks still have a trapezoidal Micro-USB socket: the power bank can be charged via this using a common Micro-USB charging cable connected to the power adapter.

Power packs with Micro-USB connectors
USB-A port

You can use the large, angular USB-A connector on the power bank to charge your mobile devices with a standard USB-A charging cable. Larger power banks have multiple USB-A charging outputs.

Power packs with USB-A connector

What else should I bear in mind?

A small power bank lies in your hand.

Size and weight

When buying a power bank, make sure the size and weight suit your purposes. An extremely lightweight and small power bank might be more important than the maximum capacity.

Powerbank is being charged.

Speed

A power pack with a USB-C port and Power Delivery and/or Quick Charge is required to charge your phone with fast charging at the highest possible charging speed.

Several devices are connected to the power bank.

Multiple device charging

If, for instance, you want to charge a smartphone and laptop at the same time, you need a power pack with multiple USB charging outputs and a sufficiently high capacity (above 20000 mAh).

All power packs

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