Swollen battery in customer phone, how to explain risk?

[alex_repair]

See 1-2 swollen battery laptops/phones per week. Customer reaction: "tuloy lang gamit, dahan-dahan lang."

No. Swollen LiPo is failed thermal runaway waiting to happen. Bag near it, sleeping with phone charging, anything.

How I explain now:

• Cells separated by punctured membrane, internal short progressing
• Heat + charge cycle accelerates the failure
• Worst case: gas vent ignites, fire, possible personal injury
• "Pwede maglakad ka sa highway na bukod sa daanan ng truck. Hindi naman lagi tumatama yung truck pero..."

Replacement battery + labor: PHP 1500-3500. Hospital ER for burns: priceless. Sino dito naka-encounter ng actual battery fire? War story?