Cordless Vax vacuum shows “E7” or a flashing battery icon and shuts down immediately when the trigger is pulled, even after charging.

Safety first: Do not attempt to open the battery pack. Lithium-ion cells can be dangerous if mishandled.

• 1. Attempt a recovery charge:
  • Place the battery on the original Vax charger.
  • Leave it connected for several hours even if the LED flashes initially.
  • Some packs will slowly rebalance and recover if not too deeply discharged.
• 2. Test runtime: After charging, refit the battery and run the vacuum on low power. If it still shuts off immediately with E7, the pack is likely defective.
• 3. Try another battery (if available): Fit a known-good compatible Vax battery. If the vacuum works normally, the original battery is at fault.

If E7 persists with the same battery, replace the battery pack. Do not use third-party chargers or attempt DIY cell replacement, as this can cause fire or injury.