This is a replacement battery lock that I made for a broken one (yellow) on Nikon Coolpix P330. It should probably fit P320 and P340 models too. In order to remove the old lock you need to remove the battery first. Then remove the old yellow battery lock by pulling it to the side (in the direction opposite to the battery door hinge). It requires some force. This is just the plastic part you need the spring from the original or purchase a spring