How to calculate watt hours for a battery?

[Padwise]

How do I calculate Watt Hours from the info on a battery:
CyberPower
Model No: CST150UC
Input 120V, 12A, 60 HZ
1500VA/900W, 60 Hz
USB-C Output 5Vdc, 2.5A Max
9Vdc, 2A Max
USB-A Output 5Vdc, 2.4A Max
Total Output; 30 W Max

To carry it onto a plane in Canada it can't be checked and needs to be under 160 Watt Hours, but from this info I can't find a formula to calculate that.

 

[berkeman]

Welcome to PF.

What is this thing? A UPS (Uninterruptible Power Supply) with battery backup? Batteries don't have AC Mains 120Vac input...

To calculate Watt*Hours on a battery, take the AHr (Amp Hour) spec and multiply by the output Voltage.

 

[Padwise]

it is a portable power supply for computers but it doesn't have an AHr rating on it anywhere

 

[Padwise]

 

[berkeman]

To carry it onto a plane in Canada it can't be checked and needs to be under 160 Watt Hours, but from this info I can't find a formula to calculate that.

Watt-Hour ratings apply to batteries, not to power supplies. Your device appears from the label to just be a simple power supply, so that limitation should not apply.

It would be best if you could call the airport's Customer Support phone line ahead of time to verify that the battery limitation does not apply to this simple power supply device.

 

[Padwise]

Thanks, the concern I guess is because there are Lithium batteries inside it that store the power.

 

[berkeman]

Thanks, the concern I guess is because there are Lithium batteries inside it that store the power.

Inside what? That power supply that you posted the label for? Can you link to the datasheet?

 

[Padwise]

That might take awhile to find, but I will try and find it then post it.

 

[russ_watters]

@berkeman the label says it is a UPS. @Padwise google the specs and they will say what the battery is.

FYI, I found the answer in roughly 7 seconds but in my defense I did have to use a calculator.

 

[Padwise]

2 Batteries inside that are each 12 V and 9 AH so that would be 108 Watt hours per battery correct, for a total of 216? or do they not add but work one after the other?

 

[berkeman]

@berkeman the label says it is a UPS.

Dagnabit!

 

[russ_watters]

2 Batteries inside that are each 12 V and 9 AH so that would be 108 Watt hours per battery correct, for a total of 216?

Yes.

 

[Padwise]

This Forum rocks! First time here and very helpful. Thanks.

 

[Tom.G]

You stated it contains Lithium batteries.
I recommend you ask the airline about this.

Lithium Ion batteries very likely have tighter restrictions on them than other battery types because. This is because their failure mode can be a hot flame that is very difficult to extinguish.

I sure would not want to be on an aircraft when/if these things light up!

Be careful and Live Long,
Tom

p.s. Lithium is reactive enough that water, instead of extinguishing it, intensifies the flame. Lithium uses the Oxygen in water (H₂O for its oxidizer.