355 BATTERY CHARGING■ Caution• Misuse of Lithium-ion batteries may result in the following haz-ards: smoke, fire, or the battery may rupture. Misuse can alsocause damage to the battery or degradation of battery perfor-mance.• Prior to using the battery pack for the first time, or after notusing it for a long time, you must fully charge the pack. Other-wise, the transceiver may not turn ON.R WARNING! NEVER charge the battery (with/without thetransceiver) in an explosive atmosphere. The optional batterychargers are not approved as Intrinsically Safe.D Battery cautionR DANGER! DO NOT hammer or otherwise impact the battery. Donot use the battery if it has been severely impacted or dropped, orif the battery has been subjected to heavy pressure. Battery dam-age may not be visible on the outside of the case. Even if the sur-face of the battery does not show cracks or any other damage, thecells inside the battery may rupture or catch fire.R DANGER! NEVER use the transceiver or the battery if eitherone is damaged, shows cracks, bruises or is deformed.R DANGER! NEVER use or leave battery packs in areas with tem-peratures above +60˚C. High temperature buildup in the battery,such as could occur near fires or stoves, inside a sun heated car,or in direct sunlight for long periods of time may cause the batteryto rupture or catch fire. Excessive temperatures may also degradebattery performance or shorten battery life.