Ampware battery provides 40 minutes battery with a minute of winding . Designer ##p Gabriel developed the mobile phone after Hurricane Katrina . Following the 2005 disaster in 2008 he was separated from his family . He found he was unable to stay in touch with them without access to power . The CrankCase allows users to charge using a magnetic battery generator . It can plug a phone in the case and also be used to purchase accessories .
Ampware 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 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 .