Power Station or Bank power passthrough

Some power stations and power banks can provide power to something else while they are being charged. This is known as pass through.

Charging batteries creates a lot of heat. As does providing power. Therefore many storage device units might not do both at the same time. More current into the battery during a given period of time (quicker charging) heats the battery up more than a lower current. So devices made to charge quickly, will likely produce the maximum heat that they can handle while charging, and can’t handle any more.

The power coming in to charge the battery has to be converted to the battery voltage. That creates waste heat.  The battery heats up while it is charging. And, the power from the battery is converted to the output voltage, which creates even more waste heat. All of that happening inside a contained unit at the same time means that all of their heat generation adds up.

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