I went to start my 05 Roadster and the battery was too low. I placed my charger on for 10 min and started it. As I was driving down the road I could hear a strang roar from under the hood. The electric radiator fan was running at full tilt. I turned off the car and restarted, instantly the fan started. When I got home I took off the Neg battery connection and left it for 5 min. Reconnected the terminal and started the car. All back to normal. I will be replacing the battery ASAP. Hope this helps if others run into electical problems.

 

Once the OEM battery has drained its best to just replace it......you did the right thing.

 

well, I finally broke down and bought a couple of battery maintainers...I am running the little batteries from Needswings...Shurykins...they don't like long spells of not driving...this should help...and I, like others, would recommend them even for your regular batteries if you don't drive them everyday. These little cars are voltage sensitive for sure...