I am gonna tell you from first hand experience don't cheap out on the charger, you will be buying again if you are driving a lot. I currently have a 10a duo charger and 12v power supply, I bought is used in the classifieds for around $100.00. As far a batteries go there is a difference I recently bought SMC batteries and like them, they are value priced and work well. I have bought 1 very expensive name brand battery and it takes forever to charge and never has balanced properly.