Bolt Cyclone PP-310 Compact Power Pack for Portable Flashes – $149.95 Shipped (Reg. $349.95)

• Li-Ion Battery, 5-Pin Connector
• 1 Sec. Recycle Time with Most Flashes
• Up to 500 Full Power Flashes
• LED Charge Level Indicators
• 100-240VAC Charger
• Charges in 2 Hours
• Removable Belt Clip
• Quick Release Shoulder Strap
• Lightweight: 14.1 oz

Note: You’ll also need to purchase a compatible cable (Canon | Nikon) to connect the power pack to your flash.