Originally Posted by merlinextraligh

I don't think the batteries are going to be a huge issue. The shifters will require very little energy, and can likely run on disposable lithium batteries that will only need replaced once a season or so (like the battery in a power meter or regular cycle computer.)

So you'll have two batteries that need recharged every 1000 miles or so (assuming similar range as Shimano) Those look to be easily accessible, and it shouldn't be that big of deal to pop 2 batteries on to a charger, as oppossed to one.