I had a terrible experience last week when my car died near Marina Walk – called the first mobile number I found online, guy showed up in an unmarked van, charged me 550 for a battery that looked used and then my car wouldn't start again two days later. When I tried to call back, the number was dead. Now I'm paranoid but I still need a proper replacement because I can't keep jumping it every morning. I came across http://batteryzoneuae.com/car-battery-replacement-marina while searching on my phone, and the fact they list actual prices and warranty sounds more legit, but I wanted to ask if anyone here has actually used them around the Marina area before I make another mistake. Do they test the electrical system or just throw a battery in? Also, how do I check that the battery is brand new and not an old one they've recharged? Really don't want to get burned twice. Appreciate any advice.