It's normal for wireless charging to warm up slightly, especially during intensive use such as gaming or streaming sessions, but abnormal if it gets too hot.

To prevent overheating when charging, please avoid:

 ● Using a phone case thicker than 2 mm.

 ● Placing metal accessories, credit cards, or pop sockets between your phone and the power bank.

 ● Recharging the battery and charging your phone at the same time.

If overheating occurs, the power bank will enter overheat-protection mode and pause charging. If this happens, please:

 ● Disconnect your phone from the power bank, take off any phone case, and let your phone and power bank cool down.

 ● Close apps that are not being used on your phone.

 ● When your phone and the power bank have cooled down, resume charging.

If you’re still having problems with the product, you can contact ESR Customer Support for further assistance. Make sure to briefly mention the tips you’ve already tried so that we can find a faster solution for you.

Please check:

 ● Your phone is an iPhone with MagSafe (iPhone 12 series or later).

 ● Your protective case is less than 2mm thick.

 ● There are no metal accessories, credit cards, or pop sockets between your phone and the power bank.

 Additional information about wireless charging speeds:

 ● Wireless charging is not as fast as wired charging.

 ● Limiting the number of applications you have open simultaneously on your phone will improve charging speed.

 ● High temperatures will reduce charging speed and restrict power, which is something that happens during wireless charging.

 ● When your iPhone stops charging at 80%, it may be due to "Optimized Battery Charging". Please check whether turning it off helps. Click Settings > Battery > Battery Health > Turn off "Optimized Battery Charging". If you haven't enabled "Optimized Battery Charging", the issue is mostly caused by the iOS upgrade. Please upgrade or wait for the next system upgrade.

If you’re still having problems with the product, you can contact ESR Customer Support for further assistance. Make sure to briefly mention the tips you’ve already tried so that we can find a faster solution for you.

The capacity reduction during charging is due to a 30% to 45% energy loss in the battery cells and conversion circuitry. Therefore, a fully charged power bank (10K) offers an estimated 6,000mAh to 7,000mAh to power devices. 

A typical smartphone has a battery capacity of under 4,000mAh. Therefore, a power bank with a 10,000mAh capacity can charge the majority of smartphones at least twice to 100% capacity.

● Operating temperature should be between 32°F to 95°F/0°C to 35°C.

● Do not expose power bank to rain, snow, or any humid environment.

● If the power bank expands or gets extremely hot, stop using immediately. Damaged batteries may exhibit unpredictable behavior resulting in fire, explosion, or risk of injury.

● Do not disassemble this power. 

● Turn off the power bank when not in use.