r3apersnoobdaoThe both of you, shut the fuckup.

1) No matter how big your voltage stabilizer is, it does NOT prolong your battery lifespan.
2) When someone said it's hard to detect battery is dead with present of VS, it's simply because your battery has a better leverage when kicking start the car due to extra capacity supplied by VS.
3) When battery dead, you measure with volt meter also no use, because even the battery is dead, the volt mater will still shows reading of 12v(Please don't be xin gah lan go tell people it will drop to how many volts).
4) The only time you get to see the weakness of a battery is, when you apply load. Not a bad idea to have a volt meter IN the cabin, when you turn your key switch to start the car you'll notice the voltage drop to 10v. That is when you LOAD the fucking battery. Anything below 10v is dangerous and you may consider to change battery.
5) Recent technologies, the nickle plates inside the battery does not breakapart. So the battery will not straight away go to hell without telling you good bye. Usually after over night you crank the engine, your starter will hesitate for a second before it move. This is a clear sign of battery weakness. It will come back and warn you several time until 1 day. You crank it you don't hear anything, because the battery is too weak until couldn't move the solenoid out to reach the flywheel. So you only hear the relay sound from starter which emit "tak tak tak tak tak" repeated noise.
Good luck and stop teaching people wrong stuff. Taobao VS is good money for the value, but reseller selling expansive sucks. But then, not many can bear the risk of importing, so it's not a bad idea to buy from that seller who know nothing about car mods also. And the someone whose father of 2 already, so old liao. Take it easy lar brader, if not later high blood pressure like me then u know