charging the LI ION battery packplease charge The New battery pack before using it. The new or stored (more than two months) battery pack, which can not reach it's full capacity for the first charging. After 2 or 3 times charging and discharging, it can reach full charge Note: do not recharge the battery pack if it is fully charged. doing so may cause the life of the battery pack to shorten or The battery pack may be damaged.  installation/ removing the battery pack the usage Time of JL-11 battery pack is about 8 hours, which is basically upon 5% transmit/5% receive/90% standby (standard duty cycle)    just see the following instructions1.plug The adapter into an electric socket 2 insert The transceiver or battery into The drop-in charging tray,3. ensure that the battery's contact is connect with the drop-in charging tray properly, while The charging is taking place, the light will glow red.4. After 3 hours charging, the LED indicator will light green which means fully charged. now remove the battery the battery or the transceiver from the drop-in charging tray.