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IonSniff — $250
Purchase IonSniff, an early-warning sensor designed to detect certain airborne indicators associated with lithium battery electrolyte leakage.

Residential electrolyte vapor detector
IonSniff
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IonSniff is an early-warning sensor designed to detect certain airborne indicators associated with lithium battery electrolyte leakage. It is not a smoke detector, carbon monoxide detector, fire alarm, or guarantee against battery fire. Always follow battery manufacturer instructions, local fire safety guidance, and emergency procedures.
If IonSniff alerts, stop charging nearby batteries if safe, avoid handling hot/swollen/smoking batteries, ventilate only if safe, and contact emergency services if there are signs of fire, smoke, heat, chemical exposure, or immediate danger.