## Step 9: Finish! Add Batteys, Reassemble and Test.

Add the batterys and test. I wrapped the batterys in tape to stop them shorting on anything. Put the batterys inside the casing and tape down to stop them bashing around and breaking anything. Re-assemble the speekers the same way you pulled them apart.

Done. Thanks for reading my instructable. I will be uploading more soonish like How To Make A Grass-Kart (go kart).
<p>can i connect a 6v lead acid battery? but it is 4.5ah.</p>
<p>Could someone please assist me, on a cell phone (hopefully standard) how much current is sent to the speakers?? Grandson question, does it need more power for a higher pitch or less. I feel like a fool as he is 7?? Lol</p>
<p>The amount of current you send to the speaker determines the loudness of that speaker. Different speakers have different current ratings. It depends on what speaker you have. I'm not sure if there is a 'standerd' output for cellphone speakers. But see if there is an ohm rating and a watt rating on the back of the speaker.</p><p>What determines the pitch of the speaker is not the current it is drawing. It's the frequency of the signal sent to it. To run a speaker a wave generator outputs signals to it, the frequency (or pitch) depends on the frequency of the input. </p><p>Probably youtube can explain better than me!</p><p>https://www.youtube.com/watch?v=DMxn3CPLe-A</p>
From what I see, you left the bridge rectifier diodes in the circuit. They will likely cause the voltage from the batteries to drop about a volt, or about 0.5 volt for each of two diodes through which the current will flow. But, they also insure the polarity from the batteries cannot be applied in reverse, even though the terminals on a 9 volt battery pretty well prohibit that, anyway. <br> <br>I know the batteries will be depleted one day, anyway. I would probably want an easier way to open the speakers to change the batteries. <br> <br>It is always fun to make electronic devices more useful for your particular needs and purposes.
I was actually looking at replacing the batterys with some 9.6V ni-mh batterys. An then adding a chardging plug.
yea.. <br>you can use super cheap electricity from the wall, but that is boring. <br> <br>spend all your money on 9V batteries.. <br> <br>
I made this for calling ducks and geese. Its not quite loud enough but stilll works well. Of corurse there is no wall plugs where you are hunting.
wtf why so many instructables about the same concept <br>ITS JUST CUTTING 2 WIRES AND CONNECTING THEM TO A FREAKING 9V CLIP JUST MAKE SOMETHING ORIGINAL!!!!!!!
I acutally made this for a compitition but missed the deadline by seconds. No other compititions came out so I decided to relice it.
thanks for pointing out the use of diode as bridge rectifier. i can't figure out at first how some people can use 9V DC to replace a 9V AC transformer in their basic computer speakers.