Unfortunately Pentax has changed the use of AA batteries on expensive model dependent battery, SD The use of AA battery / battery only with an adapter is possible. That would be fine if the would not charge and is offered to a completely overpriced price. Between 40.00 and 50.00 of the battery holder of Pentax costs. In contrast to the replica has the gold contacts on the upper side and a metal plate. Looks good and is stable. Since I have both adapters in use, I can tell. The replica has a simple metal contacts and the upper metal cover is missing. But it only cost 13.00 and functioning properly. Because everyone should think about whether it makes the business practices of Pentax with - or there where possible - dodging to another product. Delivery was quick, packaging good and function properly.