Battery-powered portable tool

A battery-powered portable tool, comprising:

• a battery pack containing at least one all-solid-state battery cell within a housing;
• a tool main body, on which and/or inside which the battery pack is mountable and from which the battery pack is demountable;
• and
• a battery temperature-measurement circuit disposed only in the battery pack or partially in the tool main body and partially in the battery pack;
• wherein the battery temperature-measurement circuit comprises:
• a high-temperature measurement circuit that outputs accurate measurement results in a high-temperature range but is less accurate in a low-temperature range, the high-temperature range differing from the low-temperature range;
• a low-temperature measurement circuit that outputs accurate measurement results in the low-temperature range but is less accurate in the high-temperature range;
• and
• a switching apparatus configured to select and/or output a signal representative or indicative of the battery temperature based on (i) an output of the low-temperature measurement circuit when an output value of the high-temperature measurement circuit enters a first abnormal range and (ii) an output of the high-temperature measurement circuit when an output value of the low-temperature measurement circuit enters a second abnormal range.