Godox Improved Propac 4500mAh PB960 Flash Power Battery Pack Kit with Dual Output for Godox AD360 AD180 Flash Canon 580EX II, 580EX, 550EX, Nikon SB-900 SB-800 SB-80DX, Sony HVL-F58AM HVL-F43AM Exclusive Agency Selling by LETWING DIGITAL(Some customers inquiry whether the battery have batch number which flash havoc mentioned such battery is IMPROVED one and we checked our battery found all have BATCH NUMBER,example:5C12K) Large-capacity lithium battery (11.1V/4500mAH), supporting about 1800 times of flashes,Dual outputs for powering two separate flashes without reducing recycle time Dual outputs for powering two separate flashes without reducing recycle time/Precise LED display panel: easy and fast to control Removable and replaceable battery module: double your flash capacity by carrying one more module Including:1x gift letwing cloth,1 x Godox PB960 Battery Pack , 1 x A/C Charger, 1 x User Manual