- Garden
- Cordless garden tools
All LEDs blink
Einhell 18V All LEDs blink on garden battery: cold or fault
Risk level
Medium
Proceed carefully and stop if the check is unclear.
Urgency
Medium
Quick answer
On Einhell 18 V Power X-Change batteries (GC-CT 18/24 Li P and GE-CT 18/28 Li trimmers), when all LEDs blink on the 3-LED capacity indicator, the battery temperature is too low: remove it from the equipment and keep it at room temperature for one day. If it reoccurs, it is defective.
Safety first
Stop and check this first
- Never use or charge a defective battery on which All LEDs blink reoccurs after one day at room temperature: remove the battery from the equipment and, when shipping or disposing of batteries, always pack them individually in plastic bags to prevent short circuits and fires.
- Before putting away or cleaning the grass trimmer, or before replacing the blade or line spool, always switch off the equipment and remove the battery pack.
Safe checks you can perform
- Remove the battery from the equipment and keep it at room temperature for one day
- Press the button for the battery capacity indicator (3 LEDs) after the one-day rest
- Verify that storage is in a dark, dry place above freezing between 5 and 30 °C
Leave these tasks to a qualified professional
- Do not attempt this professional task: Safe packaging and replacement of a defective battery via Einhell customer service
- Do not attempt this professional task: Sending both the charger and battery pack to Einhell customer service if charging fails
What a technician must be able to justify
Technician visit
These are the steps they must carry out and show you. Tick them as they work: if steps are skipped, do not accept a part swap.
These are not instructions for opening or handling the equipment yourself. They are the checks that should support a technical conclusion.
Safe packaging and replacement of a defective battery via Einhell customer service
What they doIf All LEDs blink reoccurs after keeping the battery at room temperature for one day, contact Einhell customer service or the point of sale at which the equipment was purchased for proper packaging instructions and replacement.
They must show younormal 3-LED charge status indication when pressing the button on the replacement Power X-Change battery.
In writingthe model/type, article number and ID number of the equipment along with the service registration.
Sending both the charger and battery pack to Einhell customer service if charging fails
What they doIf the battery warms up and shows 1 LED flashes (empty) yet fails to charge despite voltage at the socket outlet and good contact at the charging contacts, send both the charging unit and the battery pack to the Einhell customer service center.
They must show youa completed charge with the green LED lit (READY TO GO) and All 3 LEDs lit on the battery indicator.
In writingthe customer service center inspection result for both the Power-X-Charger and the 18 V battery pack.
Before accepting a part or repair
Nothing has been shown yet. Do not accept a part swap based on the code alone.
Follow these steps
Note: Follow the documented order. An error code identifies the affected system, but it does not prove by itself which part has failed.
Remove the battery from the equipment and keep it at room temperature for one day
- Who:
- you, without tools, after releasing the On/Off switch on the grass trimmer.
- How:
- as instructed in section 5.8 of manual 11017 and section 5.7 of manual 21024 when All LEDs blink, press the pushlock button to remove the battery from the equipment and keep it at room temperature (approx. 20 °C per section 12) for one day without placing it on the charger.
- Result that matters:
- the 18 V lithium-ion battery pack warming naturally during the one-day rest at room temperature.
- If after one day at room temperature the LEDs no longer all blink together:
- low temperature was the only cause.
- If the fault reoccurs after one day at room temperature:
- remove the battery from the equipment permanently and never use or charge it.
- Evidence to keep:
- a photo or short video of the 3-LED battery capacity indicator before and after keeping the battery at room temperature for one day.
Evidence: Einhell GC-CT 18/24 Li P y Power X-Charger 18V 2h manual de instrucciones original 34.111.02 · Einhell GE-CT 18/28 Li Power X-Change Original Operating Instructions 34.112.42
Press the button for the battery capacity indicator (3 LEDs) after the one-day rest
- Who:
- you, with the battery removed from both the equipment and the charger.
- How:
- after keeping the battery at room temperature for one day, press the button for the battery capacity indicator (Item F in manual 11017; Item A in manual 21024) and check the 3 LEDs (Item H or Item B): All 3 LEDs are lit means the battery is fully charged, 2 or 1 LED(s) are lit means adequate remaining charge, and 1 LED flashes means the battery is empty, recharge the battery.
- Result that matters:
- identifying which of the documented 3-LED states the battery displays once at room temperature.
- If 2 or 1 LED(s) are lit, All 3 LEDs are lit, or 1 LED flashes:
- the battery recovered from the cold and can be used or recharged on the Power-X-Charger.
- If All LEDs blink reoccurs:
- the battery has undergone exhaustive discharge and is defective; never use or charge a defective battery.
- Evidence to keep:
- a note of the equipment Art.-No. (34.111.02 or 34.112.42), I.-No. (11017 or 21024) and bill of purchase.
Evidence: Einhell GC-CT 18/24 Li P y Power X-Charger 18V 2h manual de instrucciones original 34.111.02 · Einhell GC-CT 18/24 Li P (1x1.5Ah) Product Datasheet 3411102 · Einhell GE-CT 18/28 Li Power X-Change Original Operating Instructions 34.112.42
Verify that storage is in a dark, dry place above freezing between 5 and 30 °C
- Who:
- you, checking the room or shed where the equipment and batteries are stored.
- How:
- check section 9 (Storage / Disposal and recycling) of manuals 11017 and 21024: remove the rechargeable battery and store the equipment and accessories in a dark and dry place at above freezing temperature, at the ideal storage temperature between 5 and 30 °C.
- Result that matters:
- preventing freezing storage conditions from chilling the battery pack.
- If the battery was kept in a freezing shed and recovered after one day at room temperature:
- store it between 5 and 30 °C from now on.
- If it was already stored between 5 and 30 °C and All LEDs blink still reoccurs after one day:
- reach out to Einhell customer service for replacement.
- Evidence to keep:
- a note of the storage location conditions and temperature range.
Evidence: Einhell GC-CT 18/24 Li P y Power X-Charger 18V 2h manual de instrucciones original 34.111.02 · Einhell GE-CT 18/28 Li Power X-Change Original Operating Instructions 34.112.42
Still not solved
If the error persists, stop here. See what the technician must do and show you.
Where this code applies
A code is meaningful only inside the right product and version context.
Primary scope
- System
- Garden
- Brand
- Einhell
- Product type
- Cordless garden tools
Known code variants
- All LEDs blink
- Battery capacity indicator all LEDs blink
- Battery charge level indicator all LEDs blink
- Einhell Power X-Change all LEDs blink
- Einhell Power X-Change todos los LED parpadean
- Indicador de capacidad de batería todos los LED parpadean
- Si todos los LED parpadean
- Si todos los LED parpadean Einhell
- Todos los LED parpadean Einhell
What it means
This entry covers the 3-LED battery capacity indicator on Einhell 18 V Power X-Change battery packs in the original operating instructions for the GC-CT 18/24 Li P (Art.-No. 34.111.02, I.-No. 11017, section 5.8) and GE-CT 18/28 Li / GE-CT 18/28 Li TC (Art.-No. 34.112.42, I.-No. 21024, section 5.7) cordless grass trimmers. When you press the indicator button and All LEDs blink, the battery temperature is too low: remove the battery from the equipment and keep it at room temperature for one day; if the fault reoccurs, the rechargeable battery has undergone exhaustive discharge and is defective. Other models may differ, and the initial blink state alone never proves a part failed.
Warnings and stop conditions
- Highsource verified
Never use or charge a defective battery on which All LEDs blink reoccurs after one day at room temperature: remove the battery from the equipment and, when shipping or disposing of batteries, always pack them individually in plastic bags to prevent short circuits and fires.
Evidence: Einhell GC-CT 18/24 Li P y Power X-Charger 18V 2h manual de instrucciones original 34.111.02 · Einhell GE-CT 18/28 Li Power X-Change Original Operating Instructions 34.112.42
- Mediumsource verified
Before putting away or cleaning the grass trimmer, or before replacing the blade or line spool, always switch off the equipment and remove the battery pack.
Evidence: Einhell GC-CT 18/24 Li P y Power X-Charger 18V 2h manual de instrucciones original 34.111.02 · Einhell GE-CT 18/28 Li Power X-Change Original Operating Instructions 34.112.42
Symptoms and causes
Probable causes · in order
- Power X-Change battery temperature is too lowCommon
Section 5.8 of manual 11017 and section 5.7 of manual 21024 state that when All LEDs blink, the battery temperature is too low (section 12 Charger indicator defines a cold battery temperature fault as below 0 °C).
Evidence: Einhell GC-CT 18/24 Li P y Power X-Charger 18V 2h manual de instrucciones original 34.111.02 · Einhell GE-CT 18/28 Li Power X-Change Original Operating Instructions 34.112.42
- Allowing the battery pack to become fully discharged instead of recharging promptlyPossible
Section 5.7 of manual 11017 and section 5.6 of manual 21024 warn that you must recharge the battery pack when you notice that device performance drops and never allow the battery pack to become fully discharged, as this will cause it to develop a defect.
Evidence: Einhell GC-CT 18/24 Li P y Power X-Charger 18V 2h manual de instrucciones original 34.111.02 · Einhell GE-CT 18/28 Li Power X-Change Original Operating Instructions 34.112.42
- Exhaustive discharge and defective battery if the fault reoccurs after one dayLess common
Both manuals state that if All LEDs blink reoccurs after keeping the battery at room temperature for one day, the rechargeable battery has undergone exhaustive discharge and is defective.
Evidence: Einhell GC-CT 18/24 Li P y Power X-Charger 18V 2h manual de instrucciones original 34.111.02 · Einhell GE-CT 18/28 Li Power X-Change Original Operating Instructions 34.112.42
Virtual technician
Does All LEDs blink still appear after these checks?
Answer a few questions to narrow down the likely cause and the safest next action. Guidance only - it never replaces a professional.
Sources and technical references
- 1
Einhell GC-CT 18/24 Li P y Power X-Charger 18V 2h manual de instrucciones original 34.111.02
Einhell Germany AG · 2022 · official_doc
- 2
Einhell GC-CT 18/24 Li P (1x1.5Ah) Product Datasheet 3411102
Einhell Germany AG · 2022 · official_doc
- 3
Einhell GE-CT 18/28 Li Power X-Change Original Operating Instructions 34.112.42
Einhell Germany AG · 2025 · official_doc
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