But with the Nokia Bicycle Charger, phone users will not need to have electricity at home.

"All they will need is to keep riding and their bicycle charger will be charging the battery," said Brad Brokhaug, the Nokia head of sales for sub-Saharan Africa.

 The charger unveiled at the Nokia Global Entry launch in Nairobi, Kenya, promises to simplify telecommunication for bicyclists and increase users of Nokia mobile phones currently estimated at 4.7 billion.

To be available on the Ugandan market by the end of the year, the charger uses a dynamo, whose continued rotation by the bicycle tyre generates energy. The energy is then transmitted through a wire into the phone's charging slot.

Brokhaug explained that charging starts at a cycling speed of 6km per hour, which is the average speed one uses while walking.

The kit comes with a phone holder to strap the phone onto the bicycle frame, and a protective bag to keep water from seeping into the phone in case one is charging under the rain.