Get off the grid and cut the cord
How to drive a high-CRI COB LED from a rechargeable 11,1V Li-Ion battery for 12 hours at full brightness. You will learn to understand and build one of four high-power high-CRI LED set-ups for portable cordless LED lights or lanterns.
Battery powered high quality LED lighting is used on balconies and terraces, in gardens and parks, on outdoor and hiking trips, and on restaurant tables – anywhere where cables are a nuisance, limiting freedom of use. The set-up shown here can be further enhanced with flicker-free PWM dimming with any µC (unused white cable from the CC-PSU).
You will find the list of parts, BOM and wiring schematic at GitHub.
You may also want to learn about LED lighting technology basics here.