This battery has a protection circuit built in for added safety.
Now available using UR18650FM 2600mAh cells from Panasonic/Sanyo, the world's largest and most highly regarded lithium ion cell manufacturer. This means the user will get greatly improved cycle life (number of recharges) whilst offering superior capacity retention during the whole life of the battery.
Cells inside this battery pack are premium quality made in Japan.
Sanyo
Superior performance & extended service life.