Fuel Up. Compact charging is at your fingertips with the Hollyland LARK MAX Charging Case. This unit will charge two LARK MAX transmitters and one receiver in under 2 hours, but can only recharge twice before the 2800mAh internal battery is drained. To recharge this device, there is a USB-C port available, and a 4 stage LED indicator lets you know where your charge is at.