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A seated battery shows no charge response, or charge never reaches a usable full state.
Battery repeatedly overheats or protection-stops during light use
Charging begins but never reaches full, or the pack remains unusable.
The pack is swollen, leaking, hissing, smoking, burning, crushed, wet, or opened.
The pack gets excessively hot, smells, discolors, or stops charging.
The full-indicating pack runs a task far less than a healthy pack.
The pack will not slide fully, latch securely, or release normally.
Power drops in normal handling while the pack shifts or feels loose.
A powered compatible charger shows no response to the seated pack.
The cool, fully charged pack starts a verified tool, then shuts it off during a brief no-load or light-load test.
Pressing and holding the state-of-charge button produces no LED indication at room temperature.
A contact is pitted, loose, melted, discolored, or arcs in use.
Tool output is much lower with this pack than with a known-good pack.
Temperature delay persists after pack and charger stabilize indoors.
Charger green LED stays on
With a charged pack installed and direction selected, the trigger produces no light, sound, or anvil movement.
Stored alone, the pack loses substantial charge without use.
Two known-good compatible tools give no response with the charged pack.
The motor can be heard, but the front output remains still in both directions with the bit removed.
A straight bit traces a visible circle at no load instead of rotating on a stable centerline.
FM-01: FM-01 NO WORKLIGHT OR MOTOR RESPONSE
FM-10: FUEL-GAUGE BUTTON PRODUCES NO LEDS
FM-02: PACK WILL NOT SEAT, LATCH, OR RELEASE
FM-08: RUNTIME IS MUCH SHORTER THAN NORMAL
FM-04: CHARGE STARTS BUT NEVER COMPLETES
FM-01: THE DRILL/DRIVER WILL NOT START WITH A VERIFIED BATTERY
FM-11: FUEL-GAUGE READING IS UNSTABLE OR IMPLAUSIBLE
FM-03: FM-03 BATTERY WILL NOT BEGIN OR COMPLETE CHARGING
FM-09: PACK LOSES CHARGE WHILE STORED
FM-03: COMPATIBLE CHARGER SHOWS NO CHARGE RESPONSE
FM-07: POWER IS WEAK UNDER A VERIFIED LOAD
FM-01: BATTERY HAS NO OUTPUT IN VERIFIED TOOLS
FM-05: HOT-COLD DELAY PERSISTS AT ROOM TEMPERATURE
FM-13: PACK BECOMES ABNORMALLY HOT WHILE CHARGING
FM-16: IMMEDIATE BATTERY SAFETY HAZARD
FM-06: PACK CUTS OUT UNDER A LIGHT LOAD WHILE COOL
FM-12: POWER IS INTERMITTENT WHEN THE PACK MOVES
FM-14: PACK BECOMES ABNORMALLY HOT DURING TOOL USE
FM-15: TERMINALS ARE BURNED, PITTED, MELTED, OR ARC
FM-15: FM-15 BATTERY LOSES CHARGE RAPIDLY WHILE STORED DISCONNECTED
Upper and lower battery housing
Protection and control assembly
External terminal array
Slide rails and guide features
Lithium-ion cell assembly
Release button and latch
Cool known-good Bosch 18V battery
Charger and indicator
A compatible 12V MAX* battery pack
An approved battery charger
Cut-resistant gloves
Damaged-lithium recycling route
A straight round-shank drill bit
workpiece
Compatible Bosch 18V battery
Known-good battery
Compatible charger
Correct impact bit
Half-inch impact socket
Hex adapter for short bits