usb-c

How Many Watts Does a 16-Foot LED Strip (USB-C) Need? + Battery Runtime (2026)

How Many Watts Does a 16-Foot LED Strip (USB-C) Need? Plus 15,000 mAh Battery Runtime A 16-foot (5 m) LED strip draws about 24 to 88 watts depending on density: low-density 2835 strips pull roughly 1.5 W/ft (24 W total), COB strips about 3.0 W/ft (48 W), and high-density 5050 strips about 4.4 W/ft (70 W). A 15,000 mAh USB-C battery holds 15 Ah x 3.7 V = 55.5 watt-hours raw, and after about 80% real-world efficiency that leaves roughly 44 usable watt-hours, so runtime = 44 Wh / strip watts. For a typical low-density 16 ft strip at 24 W, that is 44 Wh / 24 W = 1.85 hours (about 1 hour 51 minutes). Drive a bright 48 W COB strip instead and the same bank lasts only 44 / 48 = 0.92 hours (about 55 minutes). Plug your own numbers into the LED Strip Calculator(/tools/led-strip-calculator) to size...