61mm PVC Heat Shrink Sleeve for Lithium Battery Pack - 1 Meter (Yellow) [C] Touch Sensor It is built using 26700

It is built using 26700 lithium NMC cells in a 3S1P configuration

8V 12Ah Lithium battery pack

Volume Control 10 k Ω preset

Relays are most commonly used switching devices used in electronics

You can also mount it on PCB and breadboards too as they have compatible pins for it

61mm PVC Heat Shrink Sleeve for Lithium Battery Pack - 1 Meter (Yellow) [C] Touch Sensor It is built using 26700This is a yellow color 61mm 1 meter PVC Heat Shrink Sleeve for Lithium battery Pack. It can be used to protect, insulate and hold your battery packs to provide stability, electrical insulation, mechanical protection, sealing, and strain relief. Features: Operating Temperature: 10C +105C; Fit for: AA Battery Pack (Battery Not Included); Country of Manufacture: Made In INDIA Material: PVC; Net Weight: 25g Package Content: 1 x PVC Heat Shrink Tubing;