When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
I popped mine apart again and it seems like the circuit board is so thin, you could lose at least half of it's thickness and still have plenty of room for the battery, or go even thinner and use a smaller battery. Hmm...