My unit is shutting down with a displayed reading of about 3.2V only after about 2 or 3 hours of use.
I am using a 1000 mAh battery which should give about 7 or 8 hours of use assuming a current draw of ~ 110mA.
I am not sure if this is related to the Meshtastic FW(2.1.5) or the Heltec Hardware. The battery discharge limit spec is 2.45V.
Thanks