Okay, so a couple of months ago, I purchased a Sony A6000 from Best Buy, and I couldn't be happier (see that review)! I started with the battery it came with because I thought I would snapping a couple of photos here and there, nothing too crazy. Well I was completely wrong!!! I fell in love with that camera, and then fell in love with photography even more! I could not put the camera down. I started taking it everywhere! So what's a guy to do when the camera dies? Purchase another battery of course! And that's exactly what I did. I purchased not one, but two more of these Sony - NP-FW50 High-Capacity Lithium-Ion Batteries. Yes, there are off brands you can purchase for cheaper, but my outlook on that is, why buy cheaper products for a high quality camera?! That defeats the purpose. These batteries charge fast, hold a charge for a long time (depending on usage of course), and even tell you the percentage of battery left on your sony camera screen. Plus, Sony is definitely a name you can depend on, and they back up their products if you have any problems. Anyway, definitely recommend this product for any of the sony line cameras. A bit pricey, but you won't regret it.
Tip: You can find these on sale from time to time at bestbuy.com OR the other option is, find them cheaper somewhere else and Best Buy will PRICE MATCH! They are amazing at price matching.