TL4800P: #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 four power levels and an SOS function. As a self-contained light, it uses a self-contained Lithium-ion rechargeable battery pack and comes with a charger. The battery pack is removable 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. Optional spare batteries are most often purchased with these lights (BATCELL18650x4).