Let go and keep working. The rechargeable lithium-ion battery ZX865 ZITHION-X™ is compatible with the COAST PS500R flashlight as well as the G55R and G56R flashlights. The battery features a built-in USB-C port for easy charging. A battery charging indicator blinks red during the charging process and lights up green when the battery is fully charged. An overcharge/discharge protection circuit ensures that the battery is as safe as possible. The battery comes with a one-year COAST warranty against material and workmanship defects. All COAST lights serve various purposes today, both for personal and professional use. For COAST, it is essential that everyone has the opportunity to choose the right light, with the greatest and best quality and flexibility, providing the right illumination and the best possible effect. Everything to make each day safer, easier, and more comfortable. COAST – Trusted tough.