Compact and lightweight, this Rechargeable Lithium-Ion Battery from Westcott is designed for FJ80 II speedlights. A reliable backup or replacement piece, the 1500mAh, 16.65Wh battery provides 500+ full-power flashes and recharges in two hours with the included USB-C charging cable. Its durable build provides 200+ charge cycles for continued use and powerful flashes.