whenever my car is on and runing when i use an electric device like the power windows defroster i can see the lights in the car get low on light other words the car looses electricty anyone knows why??

 

weak battery... happens in my car when im doing something like turning on AC and stuff... get a REALLY powerful battery and you'll be good

 

i kinda didn't understand what you said to get a really powerful battery. would't be enough if i just got a new one but like the stock one cuz i dont' know if i get a stronger battary than it will damage the electronic devices wouldn't it??

 

I dunno, but get a good brand name battery, I forgot the good brands, but if its BRAND NEW and a good brand, it should be sufficient, OR you might want a high output alternator... I am not an expert, but the lights dimming IS normal... happens in almost all cars...