I used this before. Dami nagkalat sa banawe acc shops, even blade/concorde.

Helpfull in a bit. Me threads na rin dito about car batts.

Afaik, below 11.9v cannot start the engine na. While idle or rev a bit voltage will play bet 13-14v.

Yun iba naman, 'upgrade' to reduction type starter which can still start your car at 6v ata (not sure sa min voltage requirement)

By experience sa motolite, usually starts to fail on 25th to 26th month nya (past the 24mo warranty). Charge/power doesn't stay long na.

Kun manual ka, no need to worry at pwede itulak (in case no issue with electricals when batt fails o discharged).