Battery and emergency brake light on

Altenator is less than 2 years old, suzuki bought and installed

brand new battery put in

autozone tested battery and altenator and said both were perfect

spent $90 at suzuki to "find" problem. They told me my brand new battery is not holding a charge

Replaced battery with another new battery

suzuki said it was holding the charge yet the 2 lights come on together and shut off together.

usually its early in the morning or after 8 hours of work. After a little driving, they shut off. But when they are on, my headlights are dim and the heat doesnt work at good. Im not sure if its electrically or not.