If You receive a battery discharge warning from Your Kia Sportage, it's Kia's way of telling You that You shouldn't use auxiliary power without the engine running. It's a frustrating error to get, but it's usually innocuous; it's a way to be gently reminded that using the radio under auxiliary power can drain the battery. However, sometimes, things go a little beyond that. If Your Sportage won't start -- well, You're now beyond it. This means that You've effectively drained Your battery due to some component pulling power. If You've used the radio or left a light on, the cause is obvious. On the other hand, if You can't think or anything, then You have an issue with some component that's drawing power when it shouldn't be.
That is the warning that usually occurs anytime you use the engine off the radio. It reads something like "Battery Discharge Warning. Please use the engine operating system." This ensures that the battery will be drained without recharging.
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