Unitech HT660e User Manual

Also see for HT660e: Quick reference guide User manual

vIf the main battery is removed, the backup battery ensures the data on SDRAMis safe for up to 72 hours. To prevent data loss, do not leave the HT660euncharged with the main battery removed for an extended period. See FirstTime to Charge the Main Battery & Backup Battery on page 9 for more details.Note: Rechargeable batteries are advised to replace every year or when 500charge/discharge cycles achieved to guarantee optimal performance. Itis normal that the battery balloons or expands beyond one year or themaximum of 500 cycles. Although it does not cause harm, it cannot beused again and must be disposed of according to the location's safebattery disposal procedures.If the performance decrease is greater than 20% in a Lithium-Ion battery,the battery is at the end of its life cycle. Do not continue to use, andensure the battery is disposed of properly.The length of time that a battery power lasts depends on the battery type andhow the device is used. Conserve the battery life through the following:z Avoid frequent full discharges because this places additional strain on thebattery. Several partial discharges with frequent recharges are better thana deep one. Recharging a partially charged lithium-Ion battery does notcause harm because there is no memory.z Keep the lithium-Ion battery cool. Avoid a hot car. For prolonged storage,keep the battery at a 40% charge level.z Do not leave the lithium-Ion battery discharged and unused for anextended period because the battery will wear out and the longevity of thebattery will be at least shorter than half of the one with frequent recharges.Battery charge noticeIt is important to consider the environment temperature whenever theLithium-Ion battery pack is charged. Charging is most efficient at normal roomtemperature or in a slightly cooler environment. It is essential that batteries arecharged within the stated range of 10°C to 45°C. Charging batteries outside ofthe specified range could damage the batteries and shorten their charging lifecycle.CAUTION! Do not charge batteries at a temperature lower than 0°C, which willincrease the internal resistance to cause heat and make thebatteries unstable and unsafe. Please use a battery temperaturedetecting device for a charger to ensure a safe chargingtemperature range. Further, to protect and avoid battery from