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# For how long would the Raspberry Pi work with 6000mAh battery? ProPreview

Here we come to how the universe works and the basic laws that govern our existence. Or at least the existence of us - electrical engineers. Ok, ok - let's discuss how to calculate consumptions in some very simple terms.

Consumption * Hour should equal Capacity

• #716
• 01 Feb 2018

### For how long will the battery power the Raspberry Pi?

Let's say that the Power Bank (battery) has a capacity of 6000mAh. You could connect something to this power bank that consumes 1000mA per hour and you will be able to power this device for 6 hours.

6000mAh means 6000mA per hours which is 6A per hour.

A capacity of 6A per hour could power a device consuming 1A per hour for 6 hours or a device consuming 2A per hour for 3 hours.

Consumption * Hour should equal Capacity

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