failure mode
FM-04: FM-04 RUNTIME IS MUCH SHORTER THAN NORMAL AFTER A CONFIRMED FULL CHARGE
FM-04 RUNTIME IS MUCH SHORTER THAN NORMAL AFTER A CONFIRMED FULL CHARGE
Diagnostic overview
FM-04 RUNTIME IS MUCH SHORTER THAN NORMAL AFTER A CONFIRMED FULL CHARGE
Likely Root Causes
- The pack has aged or lost usable cell capacity
- The full indication came from a charger or contact problem
- Cold, heat, a heavy drill/driver task, or tool drag raised energy demand
- Dirty contacts created loss and heat
- The comparison task or tool condition was not equivalent
Quick Checks
- Runtime is reasonable for the same tool and load, or end-of-life capacity loss is confirmed by a controlled same-task comparison.
- The battery provides normal initial power but reaches depletion much sooner than a Fully charge the suspect battery on a designated charger at normal room temperature and confirm the charger reaches its defined FM-04
Repair Preview
1.
This is a preview of the troubleshooting guidance included in the full repair manual.
Common Fixes
- Access to a known-good compatible tool and approved charger
- A genuine compatible 12V Max lithium-ion battery
- An approved lithium-ion charger
- Compatible tool-side battery interface service
- A dry soft cloth
Related symptoms
The battery provides normal initial power but reaches depletion much sooner than a comparable healthy 2.0 Ah Bosch 12V Max pack in the same ordinary task.
The battery provides normal initial power but reaches depletion much sooner than a 1. Fully charge the suspect battery on a designated charger at normal room temperature
Included in the full manual
- root cause analysis
- tools needed
- step-by-step repair procedure
- diagrams
- exploded views
- post-repair checks
Public pages show a preview only. Purchase the full manual to download complete repair steps, diagrams, and verification procedures.