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Models

Symptoms

Battery loses charge rapidly while stored disconnected
Battery becomes unusually hot during an otherwise normal charge
A room-temperature battery seated in a proven compatible ventilated charger becomes markedly hotter than a known-good comparable battery during a normal stationary charge, without smoke, swelling or melting.
BATTERY SEATS BUT WILL NOT STAY LATCHED
BATTERY WILL NOT SLIDE FULLY INTO A COMPATIBLE TOOL OR CHARGER
Drifttiden är mycket kortare än en matchad känd god battery
The battery latches normally and works while still, but charging or tool power stops, restarts, or flickers when the pack or receiver is gently moved.
The battery shows a credible high charge or has just completed a proven charge, remains fully latched and still gives no response in a known-good compatible tool while stationary.
The battery is cool and dry but the outer shell is cracked, split, punctured, missing a piece, or open at a seam, with no smoke, liquid, swelling, odor or dangerous heat.
A proven compatible charger gives its normal full-charge indication, yet the removed battery shows little or no charge and can run a known-good low-load tool only briefly or not at all.
The battery reaches the normal seated position, but the release latch does not retain it and the pack can slide away without pressing the release button.
With the battery removed from every tool and charger, the charge-status button cannot be pressed normally, remains depressed or has broken away.
After a normal full charge, the battery loses a large amount of indicated charge or usable low-load runtime while stored by itself in a cool, dry place.
A known-good compatible charger begins its normal charging cycle, but the cycle repeatedly stops, restarts, faults, or continues abnormally without reaching completion.
A compatible charger continues to report its temperature-delay state after the battery has stabilized at room temperature and the charger works normally with another compatible battery.
The pack starts and runs a known-good compatible tool at no load, but output stops promptly during an ordinary matched task that a known-good battery completes.
The pack is fully seated, the release button is pressed, and the battery still cannot be slid out without excessive force.
The GBA18V40 starts onto the receiver rails but binds before reaching the normal seated and latched position.
The cool dry pack has a visibly cracked, missing, loose or distorted rail, release button, latch feature or molded support, whether or not insertion has been attempted.
The cool dry battery shell appears closed, but a new loose rattle, clunk or shifting movement is heard inside after a drop or impact, with no swelling, liquid, smoke, odor or heat.

Failure Modes

part