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TL 3500P Supreme Li ion Rechargeable Battery LED Tech Light. The Bigblue TL-3500P Supreme LED Aluminum Technical Light System delivers a stunning 3,500 lumens light output through 3 pieces of XML LED, and an 10 degree hot spot. The 6500K white light reflects the true vibrant colors of the surrounding while diving. 4 levels of brightness and SOS controlled by a reliable push button with battery indicator. BATCELL18650SUPREME rechargeable Li-ion battery comes with a smart charger enabling you to charge the battery in a few hours. The 4 steps power adjustment lets you choose between four output levels - IV at 100%, III at 50% , II at 25% or I at 10% extending the burn time and reducing reflections at close range. Replaceable BATCELL18650X4SUPREME Li ion rechargeable battery. Lanyard included. Double the burn time of TL 3100P and compact the size.