#1 Choice for cave and tech divers! This light is a self-contained technical light that pumps out a stunning 4800 lumen narrow beam. The TL4800P has a compact body style, uses a reliable push-button switching mechanism, a battery indicator on the light itself, and your choice of 4 power levels and an SOS function. As a self-contained light, it uses a self-contained lithium-ion 18650 Cell x 4 rechargeable battery pack and comes with a charger. The battery pack is removeable for easy replacement with an optional spare fully charged battery between dives. The TL4800P also comes with a reinforced Goodman-style glove, and an aluminum lantern-style handle, which makes this light a versatile option for any diver wanting the extreme light output needed in demanding conditions.