Researchers working at the former rubber boot maker Nokia have admitted that they can't use solar panels on a phone to keep it recharged.
According to Nokia, it's "continuously searching" for improved energy efficiency for phones. Its solar energy project was designed to assess the viability and ease of solar charging for mobile phones and boldly go where no phone charger had gone before.
The problem was that the sun did not cooperate and while it was possible to get more of a charge off its prototype in Kenya than Sweden, it could not get enough juice to even keep the phone on standby.
Nokia's company motto should be "always look on the bright side of life" at the moment. The researchers did discover that charging a mobile phone by simply using a solar charging panel on the back cover was possible. However, they added that it was challenging.
"When carefully positioned, the prototype phones were able, at best, to harvest enough energy to keep the phone on standby mode but with a very restricted amount of talk time," Nokia writes.
Another problem was that users had to carry phones around their necks to get the maximum possible charge.
Only a geek would think this was a "stylish or convenient arrangement," the scientists admitted.