Specifications:
- Protective Design -- included protect case which available to hold on the belt or bag; easy to carry. It's also much increased the protection. The connecting plug anti-wrong inserts design; avoid missed using to failure flashing system. There included the screw which can hold on the tripod mount
- Performance-- Through the test, the external battery pack can be able to reduce the recycling time. The recycling time is less than half of the original; also this is increased double times of flash as original. It is very suitable to use in continuous flash
- Much useful-- This product need to insert the 6 new AA batteries (Same battery type as the flash unit) through difference connecting plug, support to use Canon, Nikon, Sony flash light, and greatly to increase the flash light working ability. This is the best for the professional person
- This is a non-OEM generic product
- Dimension: 155 x 70 x 25mm/6.1 x 2.8 x 1.0in(L x W x H)
Details:


- More convenient design .The YONGNUO SF-17/S Compact Battery Pack provides increased external power to the SONY Flash. Recycling time and increase the total number of flash


- This Best Battery Pack be used as a perfect external power source .The Best Battery Pack uses a dual circuit charging system, faster flash recycling time


- Portable Battery Pack uses a new trigger method, its almost no power consumption under the stand-by mode, more convenient design, you can use 6 AA batteries.With this External Battery Pack can be used on battery


- Charging time is much fast than any other battery pack .when on the AA Battery, very easy, very practical. This External Battery Pack is necessary for a family of small things.This External Battery Pack is the best choice for you
Size in detail:

What Is an External Battery Pack?
- An external battery pack, or external battery charger, is a portable battery that recharges an electronic device. A person can take an external battery pack with her and recharge her electronics anywhere in the world
- Function: A person charges an external battery pack the same way he would regularly charge a portable electronic device; by plugging it into a wall socket. When his camera's battery, for example, drains, he can plug it into a charged external battery pack to recharge the camera's battery without needing an electrical outlet
- Benefits: An individual can take an external battery pack with him wherever he goes. If he has an MP3 player and its battery drains, he can plug the player into the external battery pack and continue listening to music. He can also buy external battery packs for other electronics, such as cell phones and digital cameras
- Warning: An external battery pack will recharge different electronics by different amounts. It may charge, for example, a small MP3 player several times while a larger device, such as a tablet computer, may only receive one full charge. Some companies make external battery packs for specific products to maximize the recharge
Package Included:
- 1 x External Flash Battery Pack for SONY Digital Camera
- 1 x Connector plug
- 1 x Operation indicator lamp
- 1 x Battery cover
- 1 x Battery magazine lock release button
- 1 x Connecting cord