Rome, March 27 - Two of Italy's largest energy companies say they are teaming up on development of better charging stations for electric cars. Eni and Enel say they foresee a time when a motorist can pull into an Eni service station and recharge, using electricity provided by Enel. On Wednesday the two signed a letter of intent to collaborate on a range of issues: strategic, technological, logistical and commercial. Within six months, the plan is to have charging stations available in the northern Italian regions of Veneto and Emilia-Romagna. Motorists can plan to spend about 30 minutes recharging their electric vehicle while saving as much as 50% on the fuel bill, the companies said.