Ultraspire 18650 Battery (3.4 mAh)

Handy as a backup during long nights. Take an extra battery with you during ultras, night trail runs, or long training sessions where one charge might not be enough.

You notice the advantage as soon as your light runs out of battery while running. Instead of cutting your training or race short, you swap the battery and can continue with lighting.

Suitable for regular use with Ultraspire Lumen lights. The battery is matched to these lights and can be recharged repeatedly for training and competitions.

Choose this battery primarily as a spare or replacement for your Lumen bulb. If you are using a different bulb, check compatibility first.