A technician is replacing a swollen lithium-polymer battery in a customer's smartphone. After the back cover is removed, the pack is still firmly secured to the chassis with factory adhesive. Which action should the technician take NEXT to continue the replacement safely?
Discharge the battery to 0 % first, then peel it up by the pull tab.
Insert a metal spudger beneath the battery to quickly break the adhesive bond.
Apply direct heat with a hot-air gun until the adhesive softens.
Work a plastic pry tool under the battery and slowly separate it from the adhesive.
A swollen lithium-polymer battery must be removed without puncturing or stressing the cell. The correct procedure is to work plastic pry tools (or a plastic card) between the pack and the chassis to slowly separate the adhesive. Metal tools can short the battery or pierce its foil pouch, and heating the pack or fully discharging it can cause thermal runaway or further swelling. Therefore, continuing with non-metallic tools is the only safe option; all other choices increase the risk of fire or personal injury.
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Why is it important to avoid using metal tools when removing a swollen lithium-polymer battery?
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What is thermal runaway, and why is it a risk with lithium-polymer batteries?
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How does factory adhesive affect the removal of lithium-polymer batteries, and why should plastic pry tools be used?