The Streamlight SL-B26 USB Rechargeable Battery 2-Pack is a versatile power solution for low drain devices. With a capacity of 2.6 Ah and a voltage of 3.7 V, these lithium ion batteries are perfect for use in a variety of consumer electronics.  batteries only and no micro-port USB charging cord. The sleek silver and black design, along with the convenient clam pack packaging, make them easy to handle and store. The included logo keychain adds a stylish touch to this reliable and efficient battery pack.LED keychain light with 4 modes: High, medium, Low and Blink.