1. Laptop DC adapters are commonly used in car
2. jumper cables to battery
3. car battery / motorcycle 12 volt All type MF or Conventional Capacity 3 Ah to 200 Ah.
|jumper cables to battery|
|charger laptop Rp.50,000,- = 4 dollar US|
How long do the batteries usage:
measurement results using ampermeter picture below shows approximately 4.5 amps so if we use a car battery size 70 amps then the batteries will run out 70 divided by 4.5 amps = 15.5 hours
I hope this info helps and useful