Where to buy good quality 16340 batteries for On The Road M3 Flashlight???

LED Flashlights – General Info CR123A Flashlights
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4pcs for $19: https://www.aliexpress.com/item/4pcs-lot-Trustfire-IMR-16340-3-7V-6500mAh-real-capacity-20A-Li-ion-Rechargeable-Lithium-Battery/32483307289.html

¯\_(ツ)_/¯

Or you may want to ask Neal ssschen, the ex-Banggood employee who is doing the private Aspire 18350 battery sale; pretty sure he can do something.

(^̮^)