Fenix Rechargeable Battery (ARB-L3) This battery is especially designed for Fenix RC40. The Fenix ARB-L3 features large capacity, outstanding performance and great reliability. Features: - 7.4 Volt - 7800 mAh large-capacity battery with outstanding performance - The battery has triple over-heat protect for safety and reliability - Built in over-charge, over-discharge protection circuit to ensure the maximum performance of the battery - The circuit board has front and back protections to make it more impact-resistant and reliable - No battery memory effect, negligible self discharge