What is Cell type & safety?
Li-ion vs Li-polymer, plus protection circuitry.
Short answer
Airlines restrict banks above 100 Wh (~27,000 mAh).
Cell type & safety when buying a power bank
Li-ion vs Li-polymer, plus protection circuitry.
Why it matters: Li-polymer is safer and slimmer; BIS certification matters for flights and safety.
Look for: Airlines restrict banks above 100 Wh (~27,000 mAh).
Full Power Bank buying guide