700mAh 3.7V rechargeable CR123A Battery.
Up to 500 cycles life span.
Includes protection circuit and meets UL1642, UN38.3, IEC62133 safety standards.
Do not charge above 4.2V (The 3DoT board stops charging automatically) or above 0.5C current (350mA, the 3DoT board handles this automatically too).
Do not discharge below 3.3V to maintain performance and lifespan.