When you buy an electric start generator, typically they do not come with a battery, so your going to have to buy that seperatly, at an additional cost of $45.00 to $75.00. We don't, we just pick up one of these:
http://www.ebay.com/itm/Car-Battery-...item2593959af2
Get more use out of this than a generator battery or a generator battery + charger. They come in a million different configurations. So, our electric start generators don't have a battery
We can take 3-4 portable generators to a job sight and only one pack (although typically in these scenarios we bring along the towable 25 kw diesel generator).