https://www.apple.com/shop/product/MJWY3AM/A/magsafe-battery-pack https://www.apple.com/shop/product/MJWY3AM/A/magsafe-battery... It’s existed for some time. N

https://www.apple.com/shop/product/MJWY3AM/A/magsafe-battery-pack https://www.apple.com/shop/product/MJWY3AM/A/magsafe-battery... It’s existed for some time. Not exactly what you describe but same concept.