My first design is a laptop sleeve that provides charging capabilities. It works like a portable smartphone charger would, but is made for laptops. The sleeves would be created for popular laptop models, with the charging adapter provided. The charging adapter itself would be detachable, with extra adapters being sold. Here is a rough sketch of the model:
The sleeve itself would be as thin as possible, with a built in rechargeable battery that is not visible to the everyday user. There would also be a smaller pocket for a smartphone, also with the charging capability. The laptop sleeve itself could be charged, and will have the ability to provide laptops with a full recharge.
This design is made for people who use casual backpacks and messenger bags. This design is of no particular use for those who carry backpacks with dedicated laptop compartments.