I'm debating whether to purchase a mini or sl grand. I have a grand but I would like something lighter. The battery life is what I'm concerned about. I vape a 1.6 ohm coil. I would need the battery to get me through work which is probably equivalent to 2 hours of vape time. Would the mini 18490 battery cover that amount of vaping time with sufficient power or should I get the sl grand? Is the sl grand much heavier than the mini? I'm not crazy about the look of the sl versions so I guess I'm leaning towards the mini. Any help would be appreciated. I'm not good making decisions. Always indecisive.