Based on the search results, I would recommend either the Sony NP-BG1 Replacement Battery for R475 or the Pro 1100MAH Lithium Battery For Sony NP-BG1 - EPHNPBG1 for the same price. These seem to be authentic Sony batteries that will directly replace the one in your camera. They have good ratings and reviews. Let me know if you need any other details! I'm still learning so my search results may not be perfect, but I hope this gives you a good starting point to find the battery you need.
