Streamlight SL-B34 USB-C Rechargeable 3500mAh Battery

The Streamlight SL-B34 is a USB-C rechargeable lithium-ion battery pack designed for compatible Streamlight handheld lights. It serves as a replacement or spare battery for select MegaStream-series flashlights and provides extended runtimes without a separate charger. The pack includes charge status indicators and an integrated safety circuit to help protect the cell during use and charging.

Key Specifications

• Battery capacity is 3500mAh.
• Nominal voltage is 3.6V.
• Recharge interface is USB-C.
• Full charge completes in approximately 5 hours.
• Runtime in a MegaStream is up to 13 hours.
• Charge indicator displays red while charging and green when charged.
• Includes an integrated safety circuit protecting against over-discharge and overcharge.
• Compatibility: fits select Streamlight MegaStream series lights that accept SL-B34 packs.
• Package weight is 0.15.
• Dimensions are listed as 0.95 x 3.90 x 6.55.

Designed to be a direct, serviceable power source for compatible Streamlight flashlights, the SL-B34 pack combines long runtime with the convenience of USB-C charging and visible status feedback. Its safety features and straightforward charging behavior make it a practical spare or replacement for users who prioritize dependable, easy-to-manage power for everyday carry and field use.