Amazon.com has NP-FW50 RAVPower Camera Batteries Charger Set for Sony A6000 Battery, A6500, A6300, A6400, A7, A7II, A7RII, A7SII, A7S, A7S2, A7R, A7R2, A55, A5100, RX10 Accessories (2-Pack, Micro USB Port, 1100mAh) on sale for $30.39 after clipping a 5% off coupon.
- Large Capacity and Efficient: Big capacity of 1100mAh/8.14w Battery, can charge inside the camera, or using the 2.1A input charger to maximize charging efficiency
- More Battery, More Photo: Triple your camera runtime with a complete backup package including two replacement battery and a dual battery charger to keep the empty ones charging
- Versatile Charging Option: Common micro-USB input and the ability to charge with a USB wall charger, car charger, or external battery gives you more options than a standard battery charger
- Standard Compatibility: Made to the exact specification of SONY NP FW50 battery, compatible with NEX 3/5/7 series, SLT-A series, Alpha series. (Note: NOT FOR A7III
- 100% Safety Guarantee: Built with multiple circuit protection (over-charging, short-circuit, high-temperature, and surge protection), and high-quality, fire-resistant construction