With all the etsy type innovation I'm surprised no one has come up with a battery lock system. The saveyourseatlock system would be great unless you have to remove the battery everyday to charge it. I though about trying a motorcycle disc lock under the seat clamp on the seat tube, to inhibit the space required to remove he battery. I still use a bmx style seat clamp with a HexLox, so my seat clamp will not be removed without a major hassle! If someone figures out a good system to secure the battery please share it. I generally don't worry about my battery getting taken but as ebike popularity increases I feel the theft of batteries will.