Second-cheapest in our test is the chunky Novogo S700, which features a large 3.5in, bright screen and maps for the whole of Europe.

The Novogo’s software was pretty easy to use and includes some interesting features, such as customisable colour schemes for its maps and alternative onscreen keyboard layouts (QWERTY or ABC).

A small but significant aspect is the Novogo’s sound system. Good speakers provide better-than-average audio quality and, cleverly, the device can automatically turn up its volume when speed is increased, so that spoken directions can be heard over louder engine noise.

Another good idea is the removable panel that gives access to the rechargeable battery. This makes it possible to replace a worn-out old battery with a fresh one without having to send the unit back to the manufacturer.

This article is part of a group test of satellite-navigation devices.

See also: 
Garmin Nuvi 310
Magellan Roadmate 3050T
Medion GoPal PNA465
Mio Digiwalker C510E
Navman N40i
Navsure 300i
Novogo S700
Sony Nav-u Nv-U5 0T
TomTom One Europe
ViaMichelin X-950T
When sat nav goes wrong
Galileo project

A table of features can be read via our pdf download above.