Recycling an old speaker for cheap

Tools/Items needed

Jig saw

Drill

Hot Glue gun

Speaker from a thrift store

Power Supply- AC to DC $9

Female Barrel Jack Connector $.54

Battery Charging Board with Battery Protection BMS 5V Micro USB 1A 186 50 Charge Module $.35

Micro 4.2 Stereo Power Amplifier Board Audio Module 5VF 5W+5W $7.99

 Step up Converter DC Voltage Regulator Voltage  $1.30

EEMB Lithium Polymer Battery 3.7V 1400mAh 103440 Lipo Rechargeable Battery Pack $5.99

22 Gauge Wire

Find an old speaker.

Before permanently wiring everything up use a breadboard (if you have one) to make sure nothing is shorted out or broken, make sure no wires are touching, and secure everything down.

Screw down the speaker driver and use hot glue to secure wires and the circuit boards to the inside of the speaker.