8 mistakes that are killing your power bank

Do you feel like your power bank never lasts as long as you'd like? It may not be the device that's at fault. Just like your smartphone battery, there are a few things to consider when using power banks and portable chargers to ensure they last longer. Many power banks suffer significant battery loss over time – often not due to a technical fault, but due to improper handling. As such, many of the most common problems can be easily avoided with a little know-how.

 

Today's article will show you common everyday mistakes that will gradually damage your power bank and how you can easily extend its life.

1. Instructions for using backup charger properly

1. Improper charging behavior: Too frequent or letting the battery get too depleted

 

Your next trip is coming up and of course you should charge your power bank properly first. Unfortunately, what sounds like common sense is one of the most common mistakes, as many people charge their power banks when they are still half full or almost full. Just like your smartphone battery, this will wear out the battery in the long run.

But the opposite - letting your power bank run out of juice regularly - is also a problem. Ideally, you should recharge it as soon as the battery capacity drops to around 20 to 30%.

 

2. Temperature is too high or too low

Batteries don't like extreme heat or cold. If you leave your power bank in your car in the summer or take it outside in the winter, you risk permanent damage. Temperatures above 95℃ or below 32℉ will cause the chemical processes in the battery to change, reducing its capacity and ability to hold a charge in the long run. So always store your power bank at room temperature if possible and away from direct sunlight.

3. Use cheap cables and chargers

A common and often underestimated mistake is charging with poor quality or uncertified cables and power supplies. These often do not provide the necessary current stability, which not only slows down the charging process but also puts stress on the battery in the long run. In the worst case, they can lead to overheating or short circuits. Therefore, you should only use high-quality accessories, ideally those recommended by the manufacturer.

4. Improper storage

Even if you rarely use your power bank, you still need to be careful. If you store it unused for weeks or months—especially when it's dead—it can lose its capacity permanently. For longer-term storage, keep the battery level around 50 to 60 percent. A cool, dry place is ideal (i.e. not a windowsill, car, or near a radiator).

 

5. Overcharging or constant connection

Modern power banks often have overcharging protection. However, if you leave your device plugged in all the time, such as overnight or at work, the battery will often remain at 100%, which will put stress on the battery in the long run. Lithium-ion batteries are particularly sensitive to permanent peak voltages. It's best to charge selectively and disconnect as soon as the battery is full.

6. Infrequent use or continuous idling of the battery

Backup batteries are good for occasional use, but not excessive use. If you only use them once or twice a year, you run the risk of completely damaging the battery due to deep discharge. Even when turned off, batteries slowly discharge themselves.

Short charge cycles every 2 to 3 months keep the battery cells working and avoid complete failure.

7. Use with incompatible devices

Not all power banks are suitable for all devices. For example, if you want to charge a power-hungry laptop with a simple 5V/2A power bank, you will overload the system. Likewise, if charging protocols such as Quick Charge or Power Delivery are not supported, this can lead to inefficient or even harmful charging. So be sure to check in advance that your power bank meets the requirements of your device.

8. Made of poor quality materials

Physical damage isn't just about the visual. Power banks that have been dropped, scratched, or exposed to moisture can suffer internal damage – often without apparent consequences. So look for devices made of sturdy materials, and if necessary, invest in a case or cover to keep them safe while you're on the go.

You should pay special attention to customer reviews, especially for low-cost, no-name products.