Problem · KD718 Display

E-Bike Battery Not Charging (KD718)

Causes + how to fix it

Quick answer

The battery won't take a charge. Most likely cause: a charger, plug or outlet problem, a battery that's switched off, or a battery that's too cold. Try this first: try a different wall outlet.

Try this first

Free, and each takes under 5 minutes.

Try a different wall outlet
Check the battery's own switch or key
Check the charger's lights

In plain English

Charging needs a working outlet, a charger that matches the battery, clean plugs and a battery that's ready to accept charge. Many batteries refuse to charge when they're too cold, too hot, or switched off. If the battery was fully drained and left for weeks, its protection system may have shut it down. That needs a shop, not DIY.

Step-by-step checklist

Work from the top. Steps go from free and easy to shop jobs. Switch the bike off before touching any connector. Tick each step as you go. Your progress is saved on this device.

1Try a different wall outletFree Plug something else into the outlet to make sure it works, or try another outlet. Avoid overloaded power strips.
2Check the battery's own switch or keyFree Many batteries have a key or power button of their own that must be on. Make sure it's fully turned or pressed.
3Check the charger's lightsFree Note what the charger light does with and without the battery connected. No light at all usually means the charger or outlet. A light that turns green instantly can mean the battery isn't accepting charge.
4Charge at room temperatureFree Bring the battery indoors and let it reach room temperature first. Many batteries won't charge when cold, and shouldn't be charged below freezing.
5Clean and check the charging portEasy With the charger unplugged from the wall, look into the battery's charging port and the charger plug for dirt, bent pins or scorch marks. Clean carefully.
6Check the chargerModerate Make sure the charger's light changes when it's plugged into the battery, and that both plugs are clean and fully seated. If you can, try a known-good charger with the same voltage and plug.
7Have the battery testedShop job A shop can test the battery and its protection circuit and tell you if it needs replacing. Never open the battery pack yourself.

Parts you might need

As an Amazon Associate I earn from qualifying purchases. These links go straight to Amazon.

Only buy a part if the free steps didn't fix it. Always match the voltage and connector type to your bike.

Replacement e-bike charger
Only if your charger is faulty. Must match your battery's voltage and plug type exactly.
Link coming soon
Electrical contact cleaner spray
Cleans dirt and corrosion from connector pins and battery contacts.
Link coming soon

Still not fixed?

Pages to try next:

When it's time for a shop: if you've worked through every step and the problem is still there, take the bike to an e-bike shop. Bring your notes on when it happens, plus the code.