بطارية ProMaster NP-FM500H سوني ليثيوم أيون 7.2V 1700mAh

I was a bit skeptical about third-party batteries, but this one holds a charge almost as long as the Sony original in my a77. The 1700mAh capacity gives me a solid day of shooting without needing to swap.

Popped this in my Sony a57 and it lasted through a full afternoon wedding shoot without needing a swap. The 1700mAh rating feels legit — matched the original Sony battery's runtime shot for shot. Solid backup for the price.

Shot about 800 frames on a single charge with this battery, easily outlasting the original Sony. The 1700mAh capacity really delivers for long shoots without swapping.