Additional or replacement battery for the CygoLite ExpiliOn 170 USB Rechargeable Headlight.
This battery charges inside of your CygoLite ExpiliOn 170, from empty to full in five hours. If you think you might completely drain your battery with less than five hours to go before you need the headlight, it’s a good idea to have a spare.
Note: this battery is not compatible with the ExpiliOn 350 or ExpiliOn 400. Instead see: CygoLite 3.8v 2.6 Ah Li-Ion Battery for Expilion Series.