Beware of the Beam

The slimmest headlamps with 21700 battery

The slimmest headlamps with 21700 battery ranked by specs — with beam profiles and buying options.

1 Olight Olight Perun 2 28.6 mm
  • 2500 lm
  • 166 m / 545 ft / 182 yd
  • 6889 cd
  • Flood
  • 21700 Olight Individual Li-Ion
  • Magnet
  • 161 g / 5.7 oz
2 Olight Olight Perun 3 28.6 mm black 4 colours
  • 3000 lm
  • 160 m / 525 ft / 175 yd
  • 6400 cd
  • Flood
  • 21700 Olight Individual Li-Ion
  • Magnet
  • 150 g / 5.3 oz
3 Armytek Armytek Elf C2 Max 34.4 mm
  • 4500 lm
  • 150 m / 492 ft / 164 yd
  • Flood
  • 21700 Li-Ion
  • USB-C
  • 153 g / 5.4 oz
4 Armytek Armytek Elf C2 Max LR Long Range 34.4 mm
  • 4500 lm
  • 235 m / 771 ft / 257 yd
  • Flood
  • 21700 Li-Ion
  • USB-C
  • 153 g / 5.4 oz
5 Armytek Armytek Elf C2 Max WR 34.4 mm
  • 2500 lm
  • 120 m / 394 ft / 131 yd
  • Flood
  • 21700 Li-Ion
  • USB-C
  • 153 g / 5.4 oz
6 Armytek Armytek Wizard C2 Pro Max 34.4 mm black · warm white 5 colours & light colours
  • 3720 lm
  • 110 m / 361 ft / 120 yd
  • Flood
  • 21700 Li-Ion
  • Magnet