Pls Notice:
1.When install the batteries,pls pay attention to the directions of the positive and negative.
2.Remove the batteries if the product is idle for a long periods.
3. This battery pack replacement can only boost the flash recycle speed. To use this product, your flash needs to have battery in itself.It DOES NOT supply power to flash.

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 (W*H*D): Approx. 86*33*195 mm (3.4*1.3*7.7 inch) (body only)
Weight: Approx. 400 g (14 oz.) (without batteries)

Flash unit tested:Compatible with D850
Flash 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)