9V Li-ion 760mAh USB Rehcargeable battery 2 Packs $100-$200 With adjustable headband and soft

With adjustable headband and soft ear pads will feel comfortable all the time

device not included

no need to carry an extra bulky pump which is also easy to lose

Asus M2 M3 M6 M 50 M51 M70 Series

Connecter size: USB-C Connector

9V Li-ion 760mAh USB Rehcargeable battery 2 Packs $100-$200 With adjustable headband and softHixon 9V Rehcargeable Lithium Battery USB C charge Feature: USB C Rechargeable 9V Battery 760mAh High Capacity Upgrade your devices with this USB Type C rechargeable 9V battery, designed for high performance and long life. With a large 760mAh capacity and low self discharge. Flexible Charging Options Choose a charging method that fits your setup. Use the included USB C cable for convenient charging (up to 8. 4V), or a standard 9V battery charger to