why not both?

if you are asking why that first? one at a time will do, i mean why create more sparks than necessary, and for obvious reasons, its safer to pull the -ve than the +ve (same reason why tou might notice, some ppl dont even bother to cover the -ve terminal but mati mati +ve kene tutup)

if you are asking why just one, well you only need to pull one to break the circuit, and unless you want to remove the battery, no point wasting your time having to disconnect and reconnect 2 poles when 1 is enough

alright, does this really able to save the battery to last for at least 3 weeks without starting the car?

meh unless you have some sort of parasitic drain, i wouldnt bother, keep in mind the alarm and stuff would be offline as well.

Is the battery from these shop reliable?


Attached thumbnail(s)