Many companies have been trying to produce external Macbook batteries (e.g. http://www.hypershop.com/HyperJuice/External-Battery-for-MacBook-iPad-iPhone-USB/ ht

Many companies have been trying to produce external Macbook batteries (e.g. http://www.hypershop.com/HyperJuice/External-Battery-for-MacBook-iPad-iPhone-USB/ http://www.hypershop.com/HyperJuice/External-Battery-for-Mac...), but the major stumbling block has been that Apple does not allow third parties to use the Magsafe interface. Has Gbatteries found a way around this problem?