FEEL FREE TO ASK ANY QUESTIONS BELOW. This acoustic cell phone amplifier is easy to build and increases the sound level by 8-10 db without requiring any power. With a clever port for running a charging cable, you can also charge the battery while listening to music. This is a quick project, requiring only a few dollars worth of material.

Dimensions of each piece as shown in the diagram at 1:40 :

Top Plate: 2" x 11.25" x .5"
Front/Back: 3.25" x 11.25" x .75"
Base pieces x 2 (before angled cuts): 2" wide x 2.25" tall x 5.25" long