HAOXI AODELAN External Flash Battery Packs for Portable Hot Shoe Speedlite Compatible with Nikon SB900, SB910, SB5000. Replaces Nikon SD-9 Description How to using:1.Install batteries for the flash.2.Plug the output plug of P12 Flash Battery Pack into the speedlite external power port.3.Press and hold the power button for 2 seconds,the power level indicators will light red,the P12 is turned on.4.Turn on the power of the flash,the P12 it is ready to power for the flash.Specifications:Dimensions (WHD): Approx. 8633195 mm (3.41.37.7 inch) (body only)Weight: Approx. 400 g (14 oz.) (without batteries)Flash unit tested:Nikon D850Flash fired 10 times in 8.55 seconds:One time flash fired in 0.85 second.Flash fired 15 times in 13 secend: One time flash fired in 0.87 second.Flash fired 20 times in 19 secend: One time flash fired in 0.95 second.Package : 1 External Flash Battery Pack 1 Carrying Case (12 AA batteries not included) Features: This External Flash Battery Pack can ensure a more stable power supply for the flash,extended shooting time. Fast Recycle Rates and Quick Recharging - Speedlite Power Bank up to 750 flashes per charge,fast recycle times up to 0.1 sec. Battery level and Working indicator Red light indicator for working status,Press the power button 2 sec to check the battery status with 4 intuitive LED indicators which can tell you the using state of the battery. External flash battery pack is compact, portable, and easy to connect with speedlite, shoot faster, miss fewer shots and catch every wonderful moment. Over temperature protection,this is an external high performance battery pack that shortens recycling time and increases flash capacity. if you have any question about that product,pls feel free contact us at any time.Compatible with Nikon SB5000, SB900, SB910. Product Details: Number of Batteries: 12 AA batteries required. Brand: AODELAN Battery Cell Composition: Alkaline Recommended Uses For Product: 相机闪光灯 Unit Count: 1.0 Count Product Dimensions: 7.87 x 3.94 x 1.97 inches Item Weight: 1.29 pounds Item model number: P12 Batteries: 12 AA batteries required. Is Discontinued By Manufacturer: No Date First Available: April 21, 2018 Manufacturer: HAOXI