Usually, when any warning light turns on is an indication that there is something wrong in that system.
Occasionally, malfunctions in the sensors and alert system can imply trouble in the system it represents, even though there is nothing wrong.
When a warning light or signal is noticed, the vehicle operator should either check out the system alerted [ONLY IF QUALIFIED] or have the vehicle checked by a qualified automotive service technician. This is because some malfunctions can be serious enough to cause very expensive damage to the vehicle's components.
The warning symbol with the battery icon can illuminate due to many things, some of which immediately come to mind include [but this list is not all inclusive]:
The thermometer icon usually comes on to indicate that the coolant [water and antifreeze or lubricant] temperature is above or approaching an dangerously high temperature. Uncorrected over-temperature of an engine can ultimately result in boil-off of coolant, and total destruction of an engine. It can also be dangerously unsafe for anyone trying to add more coolant to the system.
The alternator is not charging or not charging enough.
it means the light on a battery of a computer or cell phone
the battery light means that your battery is being charged properly. so let it light.
What does it mean when the airbag light and battery light on 1999 Ford Escort flashes?
The battery light means your battery is low. You should go to a mechanics.
Your battery is not being charged
That is the warning light for the charging system. If it stays on your alternator is more than likely defective.
The battery in the key fob is low.
That light doesn't mean that your battery needs to be replaced. It means that your battery is not being charged while the car is running. Have your alternator tested.
You have low fuel,and a low battery, just taking a wild stab at it.
Coolant temperature is too high.
The battery isn't being charged