700 mAh and a pen for £25? If it wasn't because it was plugged into an iPhone on a wooden table next to a coffee, I'd have called that a complete scam. Now it's a stylish scam at least.
Just get one of these bad boys 😀 (or maybe a smaller mAh. I agree this is a bit overkill for normal people).
Just get one of those very short cables. Clutter problem solved.