Nitecore NL1834 18650 3400mAh Battery - Protected Button Top
Protected and Unprotected Lithium-Ion 18650 Battery
How to do a correct test and determine whether a 18650 li-ion is a protected or non-protected battery - Quora
Panasonic/Sanyo NCR18650GA Unprotected Button Top 10A 3500mAh 18650 Ba – Liion Wholesale Batteries
Amazon.com: Speedy 18650 Battery Charger XTAR PB2C USB Output Function, Portable Li-ion 18650 Battery Charger Box w/USB Port and LED Display for all 18650 Batteries(Batteries NOT included) : Electronics
What is the Difference Between "Protected" and "Unprotected" battery – LightMen