I know that we have had a lot of problems with our driver station running low on battery this season. Anker, a company that makes portable batteries, recently unveiled their PowerHouse, an AC portable battery available for $400. This seems like a heavy price tag, but I think that it could be really useful to keep on the cart to charge the laptop in between matches, especially for the finals.
We are trying to get one through a contest they are hosting right now. If you want to help us out, and enter the contest as well, just follow the link: https://www.anker.com/deals/powerhouse?ic=9263ea908b7c90407029 and then share the link with your team mates and other nearby teams! Just be wary not to use school email addresses, because too many school accounts can get your points removed.
I think this could be a really useful tool for champs. See ya’ll there next week!
Someone else had suggested using this for charging batteries between finals, or even for outreach events. I think that this kind of product could have tons of benefits for FIRST teams in general.
EDIT: This is not an inverter for your robot batteries. It is a separate battery with a built in inverter and a much higher capacity, that can be used to charge your batteries while on the go (so they are always at hand when you need them).