Hello guys, just wanted to get your inputs if electrical or mechanical ung problem ko.

Last week, na-discharge ung battery ng car ko. I was able to jump start it with our other vehicle pero ngayon ung mga ilaw ng ABS and Handbreak is always on when I start the car. The handbreak works pero pag binitawan mo di nawawala ung on light nya.

Also while the engine is active, the readings from my voltmeter is around 12v lng. Tumataas lang to 13v when I step on the gas, pag idle naman, minsan nagdidip to 10-11v na lang before setting in the 12v range.

Battery is Motolite - around 18 months na ung age. Na discharge na rin sya once or twice before. Does this mean na malapit na mamatay ung battery kaya it messes up with the other electricals sa car? I read that a weak battery can make your other warning lights light up.

Many thanks for your input.