Quantity   Component name
6 × 18650 Li-Ion DIY 3s battery pack with built-in balance charger I did mine from old laptop batteries, check it put at https://hackaday.io/project/158720-18650-li-ion-3s-battery-pack-with-balance-charger
2 × 50 W speakers These are salvaged from an old car, 60 W 4 Ohm
1 × Wine bottle box
1 × XT60 connector
1 × 2x50W bluetooth amplifier board Here a TDA7492P amplifier board with bluetooth
1 × Rocker switch
1 × Aluminium handle
1 × Vinyl adhesive wrap Thermoretractible is the best