We highly recommend this HG-4V206CS Charger for Head Lamp and Flashlight Battery to you. It features slim and compact size， allowing you to carry it conveneintly. This charger offers overload circuit protection and reverse protection， durable to use for a long time. When the light is green， it is in normal standby condition， the red light is in charging condition. It combines a direct charger and a car charger， multifunctional to use.                                    Features             Automatically detects the type of battery<br> Auto-off when charging is finished <br> The indicator is red during charging， and turns green when charging is finished<br> Reverse protection， and the charger refuses to work when you put the battery in a reverse direction<br> Perfect fitting and satisfaction guaranteed<br> Suitable for flashlight and headlight battery<br> Portable to carry   <br>                                                            Specifications             Material     PC    <br> Dimensions     (3.77 x 1.37 x 0.98)" / (9.6 x 3.5 x 2.5)cm (L x W x H)    <br> Color     Black    <br> Weight     1.31oz / 37g    <br> Model     HG-4V206CS    <br> Input     AC 100-240V 47-63Hz    <br> Car Charging     DC 12-24V    <br> Output     4.2V±1% 600mA     <br>                                                             Package Includes            1 x Charger<br>