Genuine Trustfire battery; 2400mAh capacity 3.7V with protected board Your electronic devices need reliable long-lasting batteries to help them run at peak performance. With TrustFire Protected 18650 3.7V True 2400mAh Rechargeable Lithium Batteries you get the reliability and long battery life that you need in a design that is eco friendly. The batteries are rechargeable so they keep waste out of landfills. Outfitted with a Protection Circuit Board on the negative poles the batteries resist damage due to overcharging and overloading helping them to last charge after charge after charge. The batteries can be used in a wide variety of devices and are sold in a money-saving package of two. Normal 0 7.8 ? 0 2 false false false EN-US ZH-CN X-NONE /* Style Definitions */ table.MsoNormalTable {mso-style-name:????; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-parent:""; mso-padding-alt:0cm 5.4pt 0cm 5.4pt; mso-para-margin-top:0cm; mso-para-margin-right:0cm; mso-para-margin-bottom:10.0pt; mso-para-margin-left:0cm; line-height:115%; mso-pagination:widow-orphan; font-size:11.0pt; font-family:"Calibri""sans-serif"; mso-ascii-font-family:Calibri; mso-ascii-theme-font:minor-latin; mso-hansi-font-family:Calibri; mso-hansi-theme-font:minor-latin; mso-bidi-font-family:"Times New Roman"; mso-bidi-theme-font:minor-bidi;} The TrustFire protected 18650 rechargeable Lithium battery is equipped with a protection circuit board (PCB) on the negative pole. The PCB can protect the battery from overcharge over-discharging overload and short circuit which can make the battery safer and longer lifespan. The battery is environment friendly and perfect for super bright flash and other devices. - Genuine 2400mAh capacity - 3.7V 18650 battery - Discharging and charging protection circuitry built-in - Protective circuitry kicks in when voltage is over 4.2V while charging 2.75V while discharging