What Does "3 Green & 1 Red Light" Mean on Your KINGBULL Battery?

At KINGBULL, we want you to feel confident and informed when it comes to taking care of your e-bike—especially the battery, the heart of your ride.

One question we hear all the time is:

“Why does my battery still show one red light after it’s fully charged?”

Let’s clear that up for you!

3 Green + 1 Red = Fully Charged

When your battery indicator lights up with three green lights and one red light, this means your battery is fully charged (80%–100%) and ready to ride. This is completely normal and not a sign of a problem.

Here’s a quick breakdown of what the lights mean:

So next time you unplug your charger and see that single red light still glowing—relax. That’s just how your KINGBULL battery shows it’s at peak power.

How to Check Battery Status After Charging

To accurately view your battery level:

1. Unplug the charger from the wall.

2. Disconnect the charger from the battery port.

3. Now check the battery indicator lights. Simple as that!

Smart Charging Tips

To keep your battery in top condition, follow these expert-approved habits:

• Charge on or off the bike—whichever is most convenient.

• Top off your battery anytime—no need to wait until it’s empty.

• New batteries may take longer to charge the first few times—this is normal.

• No memory effect—feel free to recharge after short rides.

• Avoid charging in extreme heat or cold (below 14°F or above 104°F).

 Charging Safety First!

Stop charging and contact KINGBULL immediately if you notice:

• Charging takes much longer than usual

• Smoke, odor, or leaking fluid

• The battery or charger gets very hot

Your safety is always our top priority.

What About the Charger Light and Sound?

While charging your KINGBULL battery, you might notice a faint humming or buzzing sound coming from the charger—this is completely normal and nothing to worry about. It’s simply the sound of the charger operating as it converts voltage.

Here’s what the charger indicator lights mean:

• 🔴 Red light = Charging in progress

• 🟢 Green light = Charging complete

Once the battery is fully charged, the charger will automatically stop and switch to green light mode.

Before You Ride…

After charging, make sure your battery is securely locked in place:

1. Hold the battery firmly with one hand.

2. Use your other hand to turn the release switch to secure it.

3. Pull up slightly to test if it’s locked — this helps prevent theft or falls while riding.

We hope this guide makes your battery care easier and your rides more enjoyable. Got questions? Our KINGBULL support team is here for you anytime.

Stay charged. Stay safe. Ride KINGBULL.