kpx250 just arrived

[fishaholic]

So I will be starting to put it together tomorrow, so far an awesome looking bike. My question is how long do these batteries typically last and does anybody carry along a portable jump starter for emergencies? This is the first bike I've owned that doesn't have a kickstarter. Also can it be push started in like 2nd or third gear (although I can't see my older body doing it, just curious). As far as the jump starter I was thinking about possibly running wires from the battery to the exterior of the bike with some sort of plug to hook the jumper to if the battery does die. Just a thought.