A wind-up iPhone case that can charge a phone simply by spinning a handle on the back could spell the end of 'battery anxiety ' . Designers claim the Ampware CrankCase can provide up to three hours of power by winding the handle for just five minutes . It also includes a USB port that allows users to charge accessories , or a friend 's mobile phone . Scroll down for video . The Ampware Crankcase ( shown above ) will be available for the iPhone 5 , 5S and 6 models.Designers claim it can provide up to three hours of power by winding the handle for just five minutes . Mark Gabriel , co-founder of Ampware who is based in Baton Rouge , Louisiana , said he was inspired to develop the device after being separated from his family by Hurricane Katrina in 2005 . He said : ' I realised that without access to power , there was no way I could stay in touch with my friends and family . 'With millions of people facing the same issue during events like Katrina , and more recently during Hurricane Sandy , I knew there had to be a way to keep people connected regardless of access to a traditional power source . 'CrankCase leverages existing technology in a new way to generate power to keep mobile devices charged without having to depend on traditional power outlets . ' CrankCase uses a magnetic dynamo generator to produce power . Designer Mark Gabriel said he was inspired to develop the device after being separated from his family by Hurricane Katrina in 2005 . The handle on the back of the case can also be used as a support to prop up the phone for watching videos . Mr Gabriel has launched a campaign on Indiegogo to help fund development of the case . The team plans to begin shipping the device , which costs $ 59 ( £39.50 ) , in October 2015 . Apple has said that the 'all day ' battery in its new Watch lasts 18 hours with 'typical use ' . However official tests have revealed this equates to just 90 time checks , 90 notifications , three hours of talk time and 6.5 hours of music playback . Music can be played via apps on the Watch when connected to a phone , and this can be done either using the timepiece 's built-in speaker or via Bluetooth headphones . Apple defines the battery on its Watch product page and said a time check typically lasts four seconds . It is likely that a notification illuminates the screen for a similar time . This means 90 time checks and 90 notifications equate to 12 hours of screen activity . When this is added to app use and workout time the total usage is 13 hours and 15 minutes . This leaves 4 hours and 45 minutes on standby . When used just as a watch , Apple said the device will last 48 hours if checked five times an hour . CrankCase uses a magnetic dynamo generator to produce the power needed to charge the phone . This uses a rare earth metal spinning inside a magentic field to generate electrical current inside a coil of wire spun around the magnet . Mr Gabriel said that spinning the handle on the back of the case for one minute can provide enough battery life for 40 minutes of standby use for an iPhone , and 20 minutes for an iPad mini . He has now launched a campaign on Indiegogo to help develop commercial products from the prototype he and his colleagues have created . They plan to begin shipping the device , which costs $ 59 ( £39.50 ) , in October 2015 . A USB port in the CrankCase also allows other devices or accessories to be charged using the handle ( above ) The handle of the case can be folded away when it is not in use so that it can be slipped easily into a pocket .
CrankCaseAmpware CrankCase provides 40 minutes battery with a minute of winding . Designer Mark Gabriel developed the mobile case after Hurricane Katrina . Following the 2005 disaster in Louisiana he was separated from his family . He found he was unable to stay in touch with them without access to power . The Ampware CrankCase allows users to charge using a magnetic dynamo generator . It can charge a phone in the case and also be used to charge accessories .