Trouble shooting a battery - General guideUpdated 9 hours ago

Troubleshooting a battery can be challenging, and anything involving internal repairs should be left to battery professionals. This guide covers safe, basic checks that any rider can do without opening the battery pack or handling dangerous components.

1. Damage Assessment

Before testing anything, visually inspect the scooter’s battery area and connectors.

Check for:

• Water damage - signs of moisture, rust, or oxidation

• Corrosion - green/white buildup on connectors

• Connector issues:

  • Loose connectors

  • Pinched wires

  • Burnt or darkened connectors (black soot)

  • Damaged plugs or pins

If everything looks normal, proceed to the next steps.

2. Check for a Battery Fuse (Only on Some Models)

Some scooters -such as the Apollo Phantom- use an inline blade fuse.

How to check it:

1. Locate the rubber cap that covers the fuse on the battery cable.

2. Remove it to expose the blade fuse.

3. Look through the fuse’s clear window:

   • Dark/black interior = blown fuse

   • Broken or disconnected metal strip = blown fuse

If the fuse is blown, the scooter may not power on, have momentary power or charge.
Note: Not all models have a fuse.

3. Verify Charging Behavior

Before assuming a battery failure, check whether the scooter should be charging.

Ask yourself:

• Did you use battery/scooter before attempting to charge?

• Is the battery possibly already full?

  • A full battery will not begin charging.

• Does the scooter charge normally when plugged in?

  • If yes → charging system is fine.

  • If no → continue to voltage checks.

Inspect the Charging Port and Charger connector head

Sometimes the port becomes loose or dirty.

• Look for bent pins inside the port

• Check for dust, sand, or corrosion

• Make sure the port isn’t wiggling when you plug the charger in

4. Check Battery Voltage

Battery voltage tells you if:

• The battery is full

• The battery is low

• The battery is below safe limits (bad sign)

• The battery is not accepting charge

Ways to check voltage:

• Through the scooter app (if the scooter turns on) → Battery tab

• With a multimeter on the main battery connectors (if comfortable doing so) 

  • Note: your multimeter needs to be set to V⎓ and have the appropriate voltage reading range (some readings can be up to 10v-200v etc. - make sure it's set to above the voltage your scooter can produce)

Compare your reading to the chart below.

5. Apollo Scooter Voltage Reference Chart

Interpreting the voltage

• Voltage at maximum and won’t charge: Normal (battery already full).

• Voltage below “dead” threshold and won’t charge: Likely battery degradation or internal failure - replacement may be necessary

• Voltage lower than full but refuses to charge: Charging issue or battery fault.

If you are experiencing any faults or have questions, please reach out to our service team at [email protected] with photos, visuals, information and context to when the issue started, along with your proof of purchase to help expedite the process for review from our team.