Laptop batteries need electricity to charge. Magical energy isn't electricity, nor can it be converted to electricity as far as I'm aware. I've heard of some people claiming that you can recharge batteries with energy such as reiki, but I'm extremely skeptical. Honestly, I'd just get a portable generator and or power bank.
Electricity needs to be generated by a source (Example; nuclear, gas, oil, wind, water..) To power our homes with the necessary energy. Magic cannot power a home or any electrical device, such as that laptop. The reki energies are a whole skeptical thing in itself. The human body does not generate much electricity itself and thus, the energies that we produce cannot charge anything that requires electricity. I heard of rekis drain energy from batteries but I'm more on the side of energy vampire.