Kraftwerk star Ralf Hutter has hit the makers of a portable charger with a trademark infringement lawsuit for calling their product "Kraftwerk".

Bosses at Dresden, Germany-based company eZelleron have raised more than $1.5 million (£937,500) on for a portable charger that can power iPhones, tablets and GoPro cameras in seconds.

The product has already been written up in a number of tech-centred publications, and is called Kraftwerk.

However, German musician Hutter owns the trademark registration of his band's name, and it covers a number of products, including video and optical data in the field of music entertainment.

Hutter filed the suit, obtained by, in Delaware federal court on Monday (09Mar15), and it reads, "Defendant is taking advance orders for the Kraftwerk charging device. Therefore, consumers are likely to assume that there is a connection, association, or relationship between the famous electronic Music band and a charger for portable musical-playing devices.

Hutter is seeking to have eZelleron's Kraftwerk name removed from online service providers and fundraising platforms.