This Tiny Keychain Cable Charges My Laptop at 240W and I Am Not Kidding
I know it sounds impossible but yes this keychain cable 240W spec is completely real and I have tested it on my MacBook Pro. The secret is an E-Mark chip embedded inside the USB-C connector head that negotiates the right voltage before any power flows. My MacBook detected it immediately and charged at full speed. Same cable also works for my iPhone 14 using the Lightning connector, and my partner's OnePlus via USB-A to USB-C. One cable, three devices in our house all covered. Because it lives on my keychain I have literally never forgotten it anywhere since buying it. GrunX sells it directly at grunxstore.com and delivery to Mumbai has been fast.
The keychain cable 240W output is what separates this from budget multi-cables that max at 18W or 20W. If you own a MacBook, Surface Pro, or any USB-C laptop, you need at least 100W to charge at a useful speed and 240W if you want full-speed charging the cable can sustain for years without degradation. The braided nylon and zinc alloy connector heads on the GrunX Sonic are notably sturdy for a keychain product I have been yanking it off my keys daily for months without any fraying. You can see it alongside other options in the GrunX fast charging cables collection.
Price-wise this is a no-brainer compared to imported alternatives. The Rolling Square inCharge 6 costs between ₹2,500 and ₹4,000 when you buy it in India through import channels, and it maxes out at 100W with no OTG support. The GrunX Sonic keychain cable at 240W with OTG is ₹799 with an Indian warranty and COD available. If you have been waiting to finally simplify your cable situation this is the one. Your bag will thank you and your laptop battery will too.
