Battery-powered strobes give you real flash power away from mains electricity, built for location shoots and outdoor portraits. Go TTL (Godox AD-Series, Neewer Q-Series) for automatic metering, or manual (Godox AD600BM II) for fixed, repeatable output. Pick your wattage: 100Ws to 200Ws suits close-up portraits, 400Ws to 800Ws is enough to overpower direct sunlight outdoors.