Need help in this circuit

[licass90]

Hey sorry guys, i dont know if this is the right place to talk about this, but im making a bluetooth speaker, and im in a trouble calculating the hours that the battery can run

[MartinKweh]

It depends on the power requirement of the speaker you are making

[licass90]

1 minute ago, MartinKweh said:

It depends on the power requirement of the speaker you are making

i said in the picture, output 12v 2A

[MartinKweh]

Oh whoops.

[Guest]

Theoretically 6.6 hours. Here's the formula

hours = (mAh)/(A*1000) 

[Jae Tee]

if im correct it would depend on the draw. If your using 12V you'll end up with the same mah rating because your depleting them all at the same time. If instead you were to draw only abt. 3V you would get 3 times the mah because they are all supplying the same amp's at the same time. 

[Jae Tee]

1 minute ago, Konrad_K said:

Theoretically 6.6 hours. Here's the formula

hours = (mAh)/(A*1000) 

I think hes trying to under stand parallel vs. series.

[Guest]

1 minute ago, Jae Tee said:

I think hes trying to under stand parallel vs. series.

Not sure, he gave me the calculated output so I just used that to give the answer. 

 

[licass90]

7 minutes ago, Konrad_K said:

Theoretically 6.6 hours. Here's the formula

hours = (mAh)/(A*1000) 

this is the correct formula? it lasts 6hours? 

[licass90]

Just now, licass90 said:

this is the correct formula? it lasts 6hours? 

im using a protection board 

[Guest]

Just now, licass90 said:

this is the correct formula? it lasts 6hours? 

Not sure I understand your question, but I am going to try to answer anyways:

As the name states mAh = miliamphours. You said the current is 2 amperes, and prefix "mili" is 1000. So just by using mathematics I cancelled the "mili" and Amps to get the hours.

[licass90]

1 minute ago, Konrad_K said:

Not sure I understand your question, but I am going to try to answer anyways:

As the name states mAh = miliamphours. You said the current is 2 amperes, and prefix "mili" is 1000. So just by using mathematics I cancelled the "mili" and Amps to get the hours.

im trying to figure out how much can it last this battery haha, im sorry but i dont understand that much xd

[Guest]

1 minute ago, licass90 said:

im trying to figure out how much can it last this battery haha, im sorry but i dont understand that much xd

As I said before 6.6 hours. In the comment above I explained how this can be calculated with simple mathematics. 

[licass90]

Just now, Konrad_K said:

As I said before 6.6 hours. In the comment above I explained how this can be calculated with simple mathematics. 

Thank you!

[Guest]

2 minutes ago, licass90 said:

Thank you!

I just realised right now, it was the output voltage you mentioned. The power consumption of the speaker will determine the battery life. The same calculation can be used as I mentioned before.