I'm not sure if this is the right thread but I can't find anything online or in the forum for my specific issue which is the opposite of above. When I went to unlock my rear back battery for the first time it reluctantly unlocked. When I went to lock it my key wouldn't come out. After repeatedly unlocking/locking by turning the key the entire tumbler fell out! The lock/tumbler still works so the lock isn't broken. But I can't get the tumbler to stay in the rear rack battery base. No it's not a stolen bike that I'm trying to grab. In fact my bike is only 4 days old, this happened on day one! BTW it is a Bosch Performance Line system and AXA keyed. Any help would be greatly appreciated so that I can remove my battery which is now locked onto my bike. Thanks!Finally got it open. Thanks everyone for your help it is much appreciated.
If anyone reads this in the future and they are trying to drill out an Abus lock for Shimano Battery system than completely drill out the barrel which includes the spring and then ramp will fall into the chamber and battery can be removed and new lock fitted. I worked my way up to a 12.5mm drill bit before the barrel was completely gone.