Another satisfied customer and thanks to TS for this thread.

Car mileage exceeded 240k km and voltmeter had previously indicated fluctuating/under voltage (on and off on different occasions but all for a brief period of under 15 seconds before it normalises), in the 12.x volt range (which is not capable of charging battery) over a couple of months

One not so fine night, voltmeter warning beeped repeatedly, did not regularise and additionally, the battery light appeared on the dash (for the first time) alongside usual bad alternator symptoms of gradual dimming of lights and fading stereo/radio plus could sense/feel that the ('weak') engine would go dead if the accelerator pedal was not applied.

Quickly (note the emphasis) drove home after cutting off power to aircon and radio as well as avoided any start stop traffic by using the brake judiciously (as the engine would be sluggish when RPM was low - overdrive was also turned off by ECU, gear did not appear to change) - managed to drive in excess of 40km which I attribute to the healthy amaron hi-life battery.

Was quoted RM300 for half cut alternator and RM650 for original oem (APM) - both by my usual workshop, and labour was a separate charge of RM65.

Fixed at Kwong Heng in under 90 mins (was there early at 9am before any other customer, trust me, you will want to be early) for RM260:
Rebuild rectifier, carbon, starter motor brush, repair and service alternator and starter motor - so far so good, voltage in the normal range shown on voltmeter.

Gamble LOL. Calculated risk lah - car started okay hence drove to workshop early in the morning to minimise braking. Healthy battery definitely helped and so did turning off air cond and radio