failure mode
FM-13: FM-13 BATTERY RUNS A TOOL AT NO LOAD BUT SHUTS DOWN UNDER ORDINARY LOAD
FM-13
Diagnostic overview
FM-13
Likely Root Causes
- Excessive internal resistance causes voltage sag
- One weak cell group triggers protection
- Contacts or power rails cannot carry normal current
- The tool task or accessory is actually overloaded
Quick Checks
- The battery completes the matched ordinary task without protection shutdown, or repeatable load-only failure is proven.
Repair Preview
1.
This is a preview of the troubleshooting guidance included in the full repair manual.
Common Fixes
- Known-good compatible tool
Related symptoms
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 starts and runs a known-good compatible tool at no 1. Stop the task when output cuts off and remove the pack; inspect for unusual heat,
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.