A couple of quick comments on charging:
1. I purchased a three-way extension socket to plug into the power outlets. This way I never felt I was "hogging" the outlet and others could plug in as well. I used permanent Magic Marker to put my name all over the extension so nobody would accuse me of stealing it when I removed it in the morning. I just wrote "K1" all over it since that was my trail name from the Appalachian Trail.
2. The outlets in the Albergues can be, at times, VERY difficult to find. Unlike the US, there may only be one outlet in an entire room, and it can be hidden under a bed or behind something. You may have to search to find it.
3. As a rule I never worried about someone stealing my Kindle while charging. However, I did try to put it inside my backpack, or under a pillow or something to make it less "obvious." No use tempting someone. As a rule, most of the Pilgrims are very trustworthy and it is not an issue, but all it takes is one bad egg.
4. The last hundred kilometers of the Camino offers a different challenge. Unlike the longer distances, the last hundred has a number of people that are just doing the "minimum" distance to qualify as having done the Camino. There didn't seem to be the same dedication and sense of accomplishment that the longer distance pilgrims had. Many, not all of course, seemed to be just doing the 100 Km to say they had done the Camino. In O Pedrouzo, our last night on the Camino before arriving in Santiago, one woman from Korea that we had spent considerable time with, had her rather expensive cell phone stolen from the charging station. I didn't put anything there to charge because I was concerned that the station was too close to the front door and it would have been easy for someone to walk in from the street and remove something and walk back out. It was taken within a 15 minute time span and due to all the activity that morning, I strongly suspect it was someone in the building that took it and not someone from outside. At that point in our Camino there were a large number of people around that were just doing the 100 km. In that particular municipal albergue they had lockers that one could hire for 3 Euro a night and I suspect that was why. The problem the locker presents is there is no way to charge things.
I think I only had to charge my Kindle once on the entire Camino, it seems to hold a charge forever if the WiFi is turned off.