Fenix's ARB-L18-3500 delivers robust power for demanding lighting applications. This 18650 rechargeable battery combines a substantial 3500mAh capacity with multi-stage protection circuitry to guard against short circuits and overcharge conditions. The button-top design ensures compatibility across Fenix's flashlight ecosystem, while the durable construction supports extended charge cycles. Built for users who demand consistent, dependable performance from their tactical and outdoor lighting gear. Shipping Note: Lithium ion batteries are considered "dangerous goods" per US transportation regulations and can often only be transported via ground shipment. Orders containing loose batteries will typically take much longer than predicted to be delivered. Delivery times of 14+ days are common.