The Flashpoint VC-26 is the charger for the rechargeable Lithium-Ion polymer power cell for the Zoom Li-on X and Zoom Li-on III Speedlights. The packs can berecharged in about 3.5 hours, using the VC-26 USB Charger featuring USB C universal connectivity from any source. Having a charger to zap that extra battery is always a good idea, even if it is likely to never die on you. The fully charged cell delivers 480 full power shotson a single charge. Go ahead. Charge harder, faster, stronger, longer.