Battery Problem 2004 Yaris

[Nascar24]

A friend has a 2004 Yaris 1.1 vvt and has a battery which keeps going flat. He has replaced this twice with new ones from Halfords but the problem remains. It jump starts ok, any suggestions?

Regards

Alan

[Bluevitz-rs]

You'd have to check the alternator for a start. Then start checking for parisitic draw while the key is turned off with an amp meter.