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warning Misusing or mishandling a lithium-ion battery may cause a FIRE or EXPLOSION which can result in INJURY or DEATH. 
You MUST read the safety warnings and resources before purchasing, using, and/or handling batteries.

Find Samsung SDI 18650 batteries here ... start with the popular 25R, 30Q, 35E, 20S and many more.

Before using 18650 batteries, check with your device manufacturer for compatibility and usage instructions.