LED lighting – Cordless COB LED light for 3,5h @ 357lm

Get off the grid and cut the cord

How to drive a high-CRI SMD LED from a rechargeable 3,7V Li-Po battery for 3,5 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 charged with any Micro USB charger. For around 10h uptime, simply connect a Li-Po battery with 10000mAh capacity (do not use Li-Ion batteries with this type of charger).

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.