I was wondering how to get watt seconds and watt minutes from how many watts are being outputted by a device. For example, I have 4.22 volts at 20 amps which is 84.40 watts. And if that is delivered over an hour that is 84.40 watt hours. But how do I figure out how many watts are delivered over a period of one second or one minute?

I don't want this to be confused with watt-minutes or watt-hours. I am looking to find how many accumulative watts are delivered over a period of 1 second and 1 minute.

@JRE (Seperate Question) I want to find out hoe many Joules of energy my HV supply with cap bank can deliver over a period of 5 seconds. But I'm getting 2 different values for Joules and I'm not sure if I just add them. Since they are the same units and I'm not sure if these end units can be added together.

@JRE Here's what I used...

@JRE I first calculated the charge and energy from voltage and capacitance. Which gave me 29.603 Joules. Then I used watts and time in seconds to get 23,200 Joules. 23,200 is different than 29.603 Joules. I would think I would add them together to get total Joules of energy delivered. But I'm not sure.

Excuse the typo, I meant *How \ and not hoe

@JRE Do I add them together to get the total Joules, or do I do something different?

What's the name for a device or component that doesn't turn the rest of the device on when the battery voltage is too low?

@adamaero Undervoltage lockout (UVLO) .

@NickAlexeev Thanks.

What's the cause? Amalgamation and amplification of transistor cutoff/threshold voltages?

Hi. Does anyone know whether an already "fried" usb port can damage usb devices plugged into it. I understand how a damaged usb port could damage an usb device, but I'd like to know whether shorting power and ground in the port could inflict such damage, that would later damage other devices?

so if you have 84.4 watts then over an hour it will output 84.4 watt-hours, which is a unit of energy, the same as joules

units units units

@Cosinux Yes, a damaged USB port can damage a device plugged into it.

@Deep Oh ok. So if I had an output of (For seperate question) 4,640 watts from 2,320 volts at 2 amps. All I would do to find the total Joules delivered is 4,640 watts * 5 Seconds = 23,200 Joules? And I would ignore the Joules from the capacitor bank of 11uF?

are part identification questions on-topic? I want to find part numbers for a quadcopter ESC FETs. I have voltage and max continuous current rating for the ESC, and microscope pictures of the part markings

@Christoph Yes, part identification questions are on topic. There are some rules to follow, but part identification is OK.