The Streamlight STRION Piggyback Charger, model 74115, keeps your STRION flashlight ready for action. This convenient charging unit simultaneously charges both your STRION flashlight and a spare battery (sold separately), ensuring you're never without power. Crafted with durable materials, it provides a secure and reliable charging solution for compatible STRION models. Maintain peak performance and extend the runtime of your flashlight with this essential accessory.