Does anyone experience this kind of problem before?

Minsan-minsan namamatay makina ng civic vti 97 ko when i hit the break and comes to a full stop... mag-IIDLE ng konti tapos.. battery led goes blink... blink.. blink in my panel.. then dead.. I have to start the engine again.. tapos ganun na naman...

Im thinking the following problem is attributed by the ff:

* Battery (more than a year now)
* Alternator (san kaya maganda makakuha ng mas malakas un output compared dun sa stock??? )
* Idle adjustment (pede rin daw i2 sabi friend ko)

Pero baka may mas nakakaalam sa inyo kung ano talaga problema... thanks in advance..

Napapagod na kc ko sa workaround ko... lagi ko na lang kc tinatapakan un gas na naka-clutch or neutral para mag-rev sya at d mamatay...