http://www.amazon.com/Power2000-ACD-429-Rechargeable-Battery-Samsung/dp/B00T6S9UMQ/ref=sr_1_1?ie=UTF8&qid=1462983127&sr=8-1&keywords=power2000+samsung+bp1900
This has been quite reliable for me. The only downside is, when I was shooting a documentary in a high altitude, cold weather environment, I found battery life could jump from 30% to Change Battery just like that. They really needed to be kept warmer than my Samsung batteries (which too, to be fair, had a tough time). That's where a camera like Sony would have the advantage. =P