Black Diamond Cosmo 350 Headlamp

Weighs 75g (with batteries)
Code: SS22934
  • £27.99
  • (FREE UK & EU Delivery)
  • RRP £29.99
+ In Stock Now   |   Usually dispatched within 24 hours

The Cosmo 350 is a versatile compact all-rounder that is perfect for the hills and your needs round the home. The Duel fuel means that while supplied with AAA batteries it is also compatible with Black Diamonds Lithium Ion BD 1500 battery. 

Black Diamond says: 

For multi-use camping, around the house, and outdoor adventures that require a simple light with both an all-purpose beam. As well as night vision. This user has the need to run the lamp on alkaline batteries if caught away from a power source for a long backpacking trip.

The Black Dimond Cosmo 350-R is a compact all-rounder that is handy to have whatever the situation, either out in the wilderness or for your needs around the house.

With an integrated 1500 mAh Li-Ion battery that cranks out a 350-lumen max output, a micro charge port meaning that it can be recharged  at home or on the go with a power bank, a lock mode to prevent accidental waste of light, integrated % battery meter to show when you are running low and red night vision mode when the situation calls for a gentler light.

While not completely waterproof it will withstand heavy rain and even being submerged for a short time, as long as the battery is dried out afterwards, meaning that you don't have to worry about it failing you on a wet day in the hills. 

- Reviewed by BasecampGear

  • Dual-Fuel: Power with three AAA Alkaline cells (included) or the rechargeable BD 1500 Li-ion battery and charger (purchased separately) for maximum flexibility
  • 350 Lumen max output
  • Red LED night vision has dimming and strobe modes and is quickly activated with dual-button interface
  • Settings include dimming, strobe, red night-vision and lock mode
  • Multifaceted optical lens design
  • IPX8: Waterproof-Tested to operate at least 1.1 meters underwater for 30 minutes. If submerged, water may enter the battery compartment, and it will still operate; it should be completely dried out after use in wet conditions
  • Integrated battery meter display shows % of power remaining
  • Digital lock mode feature safeguards against accidental use when stored in a pack or pocket


  • Weighs: 75g
  • AAA Alkaline - Low Power: 6 lumens / 10 metres / 200 hours
  • AAA Alkaline - Medium: 175 lumens / 45 metres / 6 hours (reserve 4h)
  • AAA Alkaline - Max Power: 350 lumens / 65 metres / 3 hours (reserve 30h)
  • BD 1500 Li-ION Battery - Low Power: 6 lumens / 10 metres / 225 hours
  • BD 1500 Li-ION Battery - Medium: 175 lumens / 45 metres / 10 hours (reserve .5h)
  • BD 1500 Li-ION Battery - Max Power: 350 lumens / 64 metres / 5 hours (reserve 2h)

Material & Construction

  • Recycled elastic headband featuring comfortable next to skin
  • Repreve fibre construction
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