A battery charging circuit is described in which power is derived from a communications port such as a USB interface (22) and is supplied to a rechargeable battery (15) of a communications device (14). The communications device (14), which may be a mobile ...

The protection circuit (30) comprises at least one switch (FET1, FET2) comprising at least one control means (G1, G2) for adjusting the conductivity of said at least one switch (FET1, FET2). The conductivity is arranged to be adjustable by means of an elec...

The holder (11) is used with a telephone (10) which has an operating device (23, 24) inside it but operated from outside it, to lock the telephone to the holder or release it from the holder. Gripping the handle for the telephone and the operating the devi...

The mobile telephone and holder combination has a tongue (13), with a width which is less than that of the mobile telephone (10), cooperating with a complementary slit (15) for securing the mobile telephone to the holder (14). The inserted tongue can be he...

A mobile communications device comprising: means for determining the orientation of said device; and trained signal processing means for processing an output of the determining means.