| abstract |
A battery-powered portable tool ( 1 ) and/or a battery pack ( 174; 174 ′) connected thereto contain(s) a high-temperature measurement circuit ( 61, 62, 64; 64 - 67 ), a low-temperature measurement circuit ( 61, 64; 64 - 66 ), and a switching apparatus ( 63 ; Q 1 , Q 2 ) for selecting and/or outputting a signal from (i) the low-temperature measurement circuit when an output value of the high-temperature measurement circuit enters an abnormal range or (ii) the high-temperature measurement circuit when an output value of the low-temperature measurement circuit enters an abnormal range, which are powered by at least one all-solid-state battery ( 12, 14, 16, 18 ) provided in the battery pack. Such an arrangement makes it possible to efficiently make use of the at least one all-solid-state battery that is usable over a wide temperature range, whereby the battery-powered tool becomes usable over a wider temperature range than known battery-powered tools. |