Power any of several Savage LED lights 
This 2-Pack of NP-F750 Lithium-Ion Batteries, which is bundled with one universal 100-240 VAC charger. The provided Li-ion packs serve as spares or replacements for Sony NP-F750, NP-F770, or NP-F550 batteries, so they can be used to power Sony cameras, as well.
 
Compatibility: replace Sony np-750 / np-f770 batteries with Sony np-750 / np-f770 compatible Sony HandyCams, GVM 480s 520ls, 520s, 672s and other LED camera video lights
Durability: 4400mAh rechargeable lithium-ion battery, high-quality battery, longer battery, no memory effect;It provides extra power for the flash when you travel
The battery is made of the highest quality lithium-ion battery. It has no memory effects or other negative effects while charging.
The battery comes with a 30-day refund and a one-year manufacturer's warranty.
The package includes a 2-piece replacement SONY np-f750 battery + 2 charger
The product description
The GVM lithium-ion battery NPF 750 replaces the battery and charger
The battery is suitable for all GVM 480ls, 520ls, 520s, 672s video and other lights using Sony NPF battery.
 
SONY np-750/770 rechargeable lithium-ion battery pack replacement with high capacity/rechargeable lithium-ion battery and premium battery. Portable batteries and chargers provide extra power for your digital camera/camcorder when traveling.
 
Packing list
The GVM lithium-ion battery NPF 750 replaces the battery and charger
2x lithium-ion battery NPF 750 replacement battery
2x NPF SONY battery charger