The controller gives you full control over light levels and ride times. The 9-Watt setting is ideal for around town and easy trails. 14-Watts is perfect for longer rides, while 20-Watts gives you enough light for the toughest trails and racing.

With 10 minutes remaining, the light flashes then dims to 9-Watts. When the ten minutes are up, the light automatically shuts off to avoid damaging your battery.

The Headstrong controller is compatible with both SLA and NiMH power packs.