This, but get a jumpstarter with a battery instead. It's essentially a powerbank with attachable jumper cables. Saved me plenty of times during the cold months without having to rely on other cars being nearby.

Every game community has some rotten apples but RL has by far the highest percentage of 'em in any game I've played. I get the urge to play RL a few times per year, but it only takes a few games (be it casual or competitive) to put me off again.