15 - 2 MT2070/MT2090 User Guide

Battery
Even when stored separately from device it is important to follow industry standard guidelines. When b atteries are
stored over a year, battery cell manufacturers advise that some irreversible deteri oration in overall battery quality
may occur. To minimize this loss, they recommend storing batteries half charged in a dry, cool place between 41°
and 77°F (5° and 25°C), the cooler the better. Batteries should be charged to half capacity at least once a year. In
order to charge a battery to half capacity, take a fully discharged battery and charge it for two hours. If an
electrolyte leakage is observed, avoid any contact with the affected area and properly di spose of the battery.
Cradles
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Although the cradles are water and dust resistant, do not expose them to rain or moi sture for an extended
period of time. In general, treat the cradles as you would a pocket calculator or other electronic instrument.
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Do not drop the cradles or subject them to strong impact.
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Protect the cradles from temperature extremes. Do not leave them in a car o n a hot day, and keep them
away from heat sources.
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Do not store or use the cradles in any location that is extremely dusty, damp, or wet.
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Use a soft cloth dampened with a 50/50 solution of isopropyl alcohol and water.
•Do not allow the solution to form a pool of liquid anywhere in the cradle.
•Do not use a large amount of solution to cause the cradles to remain wet.
WARNING!Do not store the device with the battery installed. Doing so long term may cause irreversible
harm to the battery. Always store the battery removed from the device.
If a battery is installed during long term storage, it may discharge to point at which it cannot
be recovered.