DC power question

Jonathan

The esb was gone in my area there last month and the lack of the internet got me thinking..

My internet router consumes 1A at 12V.

Would I be correct in saying that, in theory, i could power that router for 2.5 hours using 8 AA (1.5V 2500mAh) batteries in series? Or maybe ive messed up somewhere..

(2.5Ah * 1.5V * 8 Batteries = 30Wh / 12Wh = 2.5h)

DublinDilbert

jmccrohan wrote: »

The esb was gone in my area there last month and the lack of the internet got me thinking..

My internet router consumes 1A at 12V.

Would I be correct in saying that, in theory, i could power that router for 2.5 hours using 8 AA (1.5V 2500mAh) batteries in series? Or maybe ive messed up somewhere..

(2.5Ah * 1.5V * 8 Batteries = 30Wh / 12Wh = 2.5h)

How do you know your router consumes 1A? Did you measure it?

Quite often the ratings on consumer products are quite conservative, it probably doesn't draw near 1A.

If it did consume 1A, your calculation above would be correct. So your battery pack is 2.5Ah, your load is 1A, hence you should get it to run for 2.5 hours....

Thomas_S_Hunterson

You're maths looks fine yea. It really depends on how much the router actually draws in operation (did you measure, or just read the rating on the bottom?).

/edit: Beaten to it.

Jonathan

DublinDilbert wrote: »

Quite often the ratings on consumer products are quite conservative, it probably doesn't draw near 1A.

Yea i'm aware of that.. worst case scenario :pac:





Sean gravity generators

Thomas_S_Hunterson

jmccrohan wrote: »

Sean gravity generators

I give you good price

Dirty_Diesel

You could just use a 12v bar battery, the smallest being around 50Ah.

Jonathan

Dirty_Diesel wrote: »

You could just use a 12v bar battery, the smallest being around 50Ah.

I am a student.