CipherLab RK25WO Reference Manual page 61

Using RK25WO Mobile Computer
PRECAUTIONS WHEN CHARGING THE MAIN BATTERY FOR A LONG TIME
Please avoid using RK25WO mobile computer with heavy system loading when it is being
charged for a long time, for the battery is continuously charged and discharged in this
period of time, and it might result in battery bulge.
Due to safety precautions, it is a normal phenomenon that the battery status shows it is not
fully recharged when RK25WO mobile computer is connected to an external power supply
for a long time. Please pull out the charging cable and then plug it again to recharge the
battery.
When being connected with a snap-on cable/ charging & communication cradle/ micro USB
cable for external power supply, RK25WO mobile computer will automatically stops
charging the battery once the battery level reaches 100%. It resumes charging the battery
when the battery power level is lower than approximate 90% and the voltage is 4.15v.
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