The Streamlight 18650 USB Battery 2-Pack (22102) are rechargeable lithium-ion batteries that are used to power the PolyTac X, ProTac 2L-X, ProTac HL-X, and ProTac HL5-X flashlights. The Micro-USB input can fully charge the battery in five hours.

USB Rechargeable Lithium-Ion Battery

• 18650 button top lithium-ion battery with on-board safety control circuit
• Micro-USB input; charges in 5 hours
• Integrated safety circuit protects battery from overcharge/overdischarge
• 2.75 in (7.0 cm); 1.7 oz (48 grams)
• Use the 18650 USB battery to power the PolyTac X, ProTac 2L-X, ProTac HL-X, and ProTac HL5-X and transform these multi-fuel lighting tools into rechargeable systems