how to make mini Bluetooth speaker at home malaylam/ rechargeable Bluetooth speaker 15w 

12 v powerful blutooth speaker
6 hour continues working 100%
blutooth aplifire board
#Aliexpress Rs. 204.14 8%OFF | TZT 10W/15W/20W Stereo Bluetooth Power Amplifier Board 12V/24V High Power Digital Amplifier Module XY-P15W
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3s battery pack
• 3S 12.6V Cell Li-ion 1...
Charging connector ₹ 10
On off switch ₹ 10
12v 2a adapter ₹80