I'd been wanting another Anker 20100mAh PC+ USB C power bank, but they have been sold out for several months online. Bit the bullet and went ahead and got the new Anker 26800mAh PC+ PD 45W USB C on sale black friday for about $100, ran it for 9 hours on my mixpre 6 with 2 mics using phantom and 2 mics run off their own power supply and the power bank still showed half of the bars left.