The Ultafire BRC18650 Rechargeable Battery is becoming more popular since the advent of the CREE LED headlamps, it is also used in high power LED lights and power hungry handheld equipment. This powerful 3.7 Volt Lithium Ion 5000mah unit is truly a serious rechargeable battery very much now in demand. It has a low discharge rate, no memory effect, both Short Circuit and Over Current Protection. Shelf life averages 10 years and is enviromentally friendly.
(Note: Approx Size 68mm x 18mm
It is not Penlight or Pencil Sized, it is bigger)
Not suitable for ecigs.