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What's IEC62133-2:2017 Certification of Lithium-Ion Battery?
IEC 62133-2: Die neue Batterie-Sicherheitsnorm
UL2054 Kc IEC62133 Rechargeable Lithium Ion Battery 18650 3.7V 2600mAh Li Ion Battery with PCM for LED Light/Bluetooth Speaker - China Li Ion Battery, 3.7V 2600mAh Li Ion Battery | Made-in-China.com