This is good to know, thanks for sharing.
AW and other Li-ion batteries are also widely used in the vaping/e-cig hobby/community in the UK and elsewhere (I discovered this from taking this route to stop smoking earlier in the year). As an 18+ thing, it may not be apt to post links here, but there are lots of online shops here in the UK that are another potential source for batteries, if you felt inclined to check them out.