Kia Starter

From what you've described do the following:

1. Have your battery charged fully then load tested. You could have a dead cell(s) and it's not holding a charge.
2. Have your alternator tested. If it's putting out anything less than

My bet is that your battery is most probably OK (but almost fully drained right now) but your alternator is bad. However, there is a possibility that both may be gone so don't be surprised if your mechanic or dealer says to replace both.

Good luck - Jonathan

Exact same symptoms I had on my 2001 Sephia. The alternator appeared to be fine at idle, but as soon as it got over about 1500 RPM it would cut out. That meant that the battery had to supply all of the electrical power whenever it was driven. The short term solution until I could get it to the dealer was to put a battery charger on it every night.

When I finally took mine to the dealer they tried to tell me there was nothing wrong with the charging system. After a lengthy discussion with the Service Manager I got them to test it again at highway speed RPM. That finally convinced them and they replaced the alternator.

Mike

First check the battery connections for corrosion. a mechanic can check for load test and crank load test with a Snap-on meter. in one case it turned out everything was fine, but the battery ground was not making a good contact, under the connector was white corrosion that acted as an insulator.