Canon Battery Pack BP-422 The BP-406 is the standard battery providing approximately 3 hours and 20 minutes of power with the external viewfinder in use Intended for the Canon Elura 2 and Elura 2MC Reliable power for powerful image-making Lithium ion doesn't require being fully run down to be recharged with peak performance No more guessing how close you are to the end of the battery, and no worries about shortening the battery life by frequent recharges