#4. "RE: D5100 Battery" In response to In response to 2 Fri 08-Feb-13 10:10 PM by Leonard62
Nikon has tried to discourage 3rd party battery makers from copying their batteries by having the dslr bodies that use the EN-EL14 recognize original Nikon batteries and to reject 3rd party batteries. This worked for awhile until these 3rd party makers reverse engineered the Nikon protection chips and started to add these chips into their products. I personally won't buy these 3rd party batteries.
edit: And to the original poster I find it is curious that the same battery is so much more costly in Canada versus the US.