Rechargeable Lithium-ion Battery for Canon NB-13L

This battery pack has been sold out for several months now. Best Buy, am I correct to assume you are no longer selling the Canon Rechargable Litium-ion Battery NB-13L. I have not been able to find another way to buy authentic Canon merchandise.

is the Canon - NB-13L Lithium-ion Battery the replacement battery to be used with the Canon - NB-13L Lithium-ion Battery?