ivCAUTION! Do not charge batteries at a temperature lower than 0°C, which willincrease the internal resistance to cause heat and make the batteriesunstable and unsafe. Please use a battery temperature detectingdevice for a charger to ensure a safe charging temperature range.Storage and safety noticeAlthough charged Lithium-Ion batteries may be left unused for several months, theircapacity may be depleted due to build up of internal resistance. If this happens theywill require recharging prior to use. Lithium-Ion batteries may be stored at tempera-tures between (-4° - 140°) -20°C to 60°C, however they may deplete more rapidly atthe higher temperature ranges. It is recommended to store batteries within normalroom temperature ranges.WarrantyThe following items covered under Unitech Limited Warranty are free from defectsduring normal use:• PA600 – 1-year limited warranty.• Lithium-Ion battery – 6-month limited warranty.The warranty becomes void if the equipment is modified, improperly installed or used,damaged by accident or neglect, or if any parts are improperly installed or replaced bythe user. Use only the AC Adapter supplied. Using the wrong AC Adapter may dam-age the unit and will void the warranty.