The Watson BP-U35 Lithium-Ion Battery Pack works with the same cameras as the Sony BP-U35. This replacement 14.4V battery pack features a capacity of 3500mAh/50.4Wh of output power, 44% higher output than BP-U35 batteries of the same size to provide extended runtime. It features a convenient 4-LED battery level indicator. Small and lightweight, lithium-ion batteries can be charged or discharged at any time without developing a memory effect.
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This battery was the perfect fit for my Sony FX6 package. I lost the one it came with and this made for the perfect replacement at a fraction of the cost. It fit just fine and didn’t have any weird power issues with it so far! If you’re looking for more batteries for your Sony FX6 don’t sleep on these! [I have received this product in exchange for my honest review.]