Streamlight 78105 Stinger SL-B26 Li-Ion 2600 mAh 2 Pack Batteries For The New Stinger 2020. SL-B26 Battery Pack Li-Ion USB, Batteries Have Built-In USB Ports For Charging. Batteries Can Be recharged With Stinger Smart Charger, Bank Charger, External Battery Bank Charger Or USB Cord And Charged Up To 500 times. Rated Capacity mAh: 2600 Chemical Composition: Li-Ion Rechargeable: Yes Quantity: 2 Pack