Streamlight SL-B9 Rechargeable Battery Pack 3.6V Lithium Ion

The Streamlight SL-B9 Battery Pack delivers reliable 3.6-volt lithium-ion power for compatible Streamlight tactical flashlights. This rechargeable battery solution eliminates the ongoing cost and inconvenience of disposable batteries while providing consistent illumination output.

What Makes This Different

Unlike standard alkaline batteries that lose voltage as they discharge, the SL-B9 maintains steady 3.6-volt output throughout its cycle. The lithium-ion chemistry provides approximately 500 charge cycles, significantly reducing long-term operating costs. Built-in protection circuitry prevents overcharging and deep discharge damage that can destroy lesser battery packs.

Key Features

• 3.6-volt lithium-ion rechargeable battery pack
• Compatible with select Streamlight flashlight models
• Integrated protection circuit prevents overcharge and over-discharge
• Approximately 500 charge/discharge cycles
• Silver and black housing matches Streamlight flashlight aesthetics
• Drop-in replacement for disposable battery configurations
• Memory-free operation - no capacity loss from partial charging

Field performance remains consistent across temperature ranges where alkaline batteries typically fail. The SL-B9 maintains capacity in cold conditions and resists the voltage sag that causes tactical lights to dim during extended use. Law enforcement and security professionals rely on this battery pack for duty lights that must perform without degradation during critical situations.

Technical Specs

• Voltage: 3.6 volts nominal
• Chemistry: Lithium-ion rechargeable
• Cycle life: Approximately 500 charges
• Housing: Silver and black polymer construction
• Protection: Built-in overcharge and over-discharge circuitry
• Compatibility: Select Streamlight flashlight models
• Package: Single battery pack
• Model: 20237 SL-B9

This battery pack represents a practical upgrade for users who demand reliable illumination without the expense of constantly replacing disposable batteries. The SL-B9 pays for itself through reduced battery costs while ensuring tactical lights maintain peak performance when needed most.