I've had discussion with a dynamo light maker about fabricating a cache battery into their light. Large enough to last 2h. To deal with technical slow off road climbs.
That said, off road climbs you want a head mounted light anyway. As Andy said.
The revo is good, I like that you can swap it between bikes and also fit a battery light into the same mount.
If you have a Sinewave Beacon you can hook up the usb out to a battery and then the usb our from the battery back into the light for slow off road riding.
I've had discussion with a dynamo light maker about fabricating a cache battery into their light. Large enough to last 2h. To deal with technical slow off road climbs.
That said, off road climbs you want a head mounted light anyway. As Andy said.
The revo is good, I like that you can swap it between bikes and also fit a battery light into the same mount.