Big Blue 21700x4 Supreme Battery Pack

Description

The 21700 is a physically larger cell than the 18650 and holds more energy for it, which is why the Supreme Pro runs longer than the Supreme on the same four-cell layout. This is that pack sold separately: a lithium-ion rechargeable four-cell 21700 assembly for the TL3800P Supreme Pro, and no other model. The distinction matters when ordering, because the Supreme takes a four-cell 18650 pack instead and the two are not interchangeable despite the similar name. A spare is the only way to run a second technical dive in a day, given that charging is measured in hours and swapping in seconds. It is supplied as a sealed assembly rather than loose cells, keeping them balanced and the light's regulation predictable. A matching charger is sold separately. It suits a TL3800P Supreme Pro owner who dives twice in a day.

Features

• Lithium-ion rechargeable battery pack, four 21700 cells
• Fits the TL3800P Supreme Pro only
• Larger cell format than the 18650 Supreme pack; not interchangeable
• Sealed pack rather than loose cells
• Charger sold separately

What's Included

• One four-cell 21700 Supreme battery pack