Just initial setup. You can decide on which gears it will switch front chainrings, but I just left it on default. During setup, you can also set trim positions for the front derailleur for each gear, and it will remember those positions and automatically trim so the chain doesn’t rub, which is another nice feature.
I have the Shimano system with the battery in the seat tube, so once every few months. I have a friend with the fully wireless SRAM system, and it’s every few weeks for her.
Just initial setup. You can decide on which gears it will switch front chainrings, but I just left it on default. During setup, you can also set trim positions for the front derailleur for each gear, and it will remember those positions and automatically trim so the chain doesn’t rub, which is another nice feature.
How often does it need charged?
I have the Shimano system with the battery in the seat tube, so once every few months. I have a friend with the fully wireless SRAM system, and it’s every few weeks for her.