I have a 7a. The battery life is enough to get Mr through a shift at work and a half hour charge 12 hours later gets me through the rest of the day.
I got a case with a magsafe on the back and bought a little magsafe power bank. Wireless charging with it puts my battery at a standstill, and I can use it to charge my ecig and my headphones, so for £15 it’s useful.