EagleTac 16340 Rechargeable Battery

Measures only 34.4mm in height (+/-0.1mm) and 16.7mm in width
IC protected for over-charge and over-discharge, short circuit, current overflow of 3A+
True protrude top design, fits all flashlights
High discharge rate 3A+
Nominal voltage: 3.7V, charge up to 4.2V, use CC/CV charger to charge
Reinforced steel plate bottom, highly efficient protective PCB design
Packaged in individual box and anti-static bag