HKJ tested the 3100mAh Orbtronics and declared them “very good” Test / Review: Orbtronic 18650 3100mAh (Black)
Cheapest I’ve seen the panasonics is about $8 each, which is the bulk price or group buy price.
Borked is investigating a group buy at FEELER - Panasonic 18650 protected 3400mAh button top batteries and waterproof storage case - POTENTIAL GROUP BUY
Did you know that you could recycle laptop cells ? You may get better but unprotected cells than the trustfire labelled ones you’ve seen.