How To Fix Vax ONEPWR Battery Not Charging?- 5 Fixes!

Vax ONEPWR is a great removable battery pack that works with various cordless vacuum cleaners. I’m using a Vax ONEPWR Blade 4 cordless vacuum that gives approx 80 minutes of run time on a single charge.

But yesterday, I noticed that my VAX ONEPWR battery flashes red and won’t turn on.

I removed the battery pack from the vacuum cleaner and plugged it into the charger, but unfortunately, there was no sign of charging.

When I contacted the Vax customer support team, they suggested a few troubleshooting that fixed the charging issue of my Vax ONEPWR lithium-ion battery.

I will share those troubleshooting methods in this guide. If you follow them correctly, your battery pack will start charging again.

Also Read: How To Fix iLife Robot Vacuum Not Charging

Why is My Vax ONEPWR Battery Not Charging?

There are several reasons why your Vax OnePWR battery is not charging. It includes a faulty charging station, a completely drained battery, a faulty wall outlet, and defective battery cells. The life of OnePWR lithium-ion batteries is 400 charge cycles which means they will last for 1.5 to 2 years.

So, if your battery pack is not too old, here are a few easy fixes for the charging problem…

How To Fix Vax OnePWR Battery Not Charging?

OnePWR Battery Pack

Here’s how I fixed the charging problem on my Vax OnePWR Lithium-Ion Battery-

Step #1– Take a multimeter and set the knob to 20V DC. Now, connect the black wire of the multimeter to the right side pin of the battery pack and touch the red wire with the other pins individually.

Any voltage reading will ensure the positive and negative terminals of the battery. Here is a video tutorial on recognizing any battery pack’s positive and negative terminals.

YouTube video

Step #2– Once you know the positive and negative terminal of the Vax OnePWR battery pack, jump it with another good battery. This will energize the dead Li-ion cells.

To jump, take a speaker wire and connect the negative terminal of the good battery with a bad battery, followed by the positive terminals. Keep the wires connected for 10 to 12 seconds; this will reset your Vax OnePWR battery pack.

Step #3– Disconnect the wires and immediately put your Vax OnePWR on the battery charger.

If there are no major faults like dead cells or faulty circuits, this solution will fix the charging problem in most cases. I also fixed the charging problem with this method.

I followed the same steps with my DeWalt Li-Ion battery pack, and it started charging again. I recommend you to read that guide for detailed steps that I followed.

Other Methods To Fix Vax ONEPWR Battery Charging Issue?

The problem is usually only with the charger and charging pattern. So, follow these solutions to diagnose and fix the issue-

1- Plug and Leave

Vax ONEPWR Battery in Charger

The battery would have completely drained if you ignored the red led flashing when vacuuming the floor.

And it will not charge until you plug it in for at least 3 hours. So, plugin your Vax ONEPWR into the charger and leave it for at least 3 hours.

Read Next: How To Fix LeFant Robot Vacuum Not Charging

2- Try a new outlet

Power Outlet

If the outlet is not working, then your battery won’t charge. Check if the indicator light turns on when you plug the charger into the outlet.

If it doesn’t turn on, then find another wall outlet and try to charge your Vax ONE PWR battery.

Also Read: How To Fix iRobot Roomba Not Charging

3- Try a new charger

ONEPWR Charger

If you still can’t charge your battery, it’s probably the charger that has gone faulty. Try a new charger to check whether your OnePWR Li-ion battery pack is charging.

Click here to check the price of OnePWR Fast Charger on Amazon

4- Contact support

Vax ONEPWR batteries are designed for 400 charge cycles. After completing 400 cycles, the batteries lose their capacity and create charging problems.

When you unscrew the battery pack, you’ll find a series of five 3.7V cells of 1800mAh capacity. You can contact the customer support team for a battery replacement if it’s under warranty.

Also Read: How To Fix Robotrock Vacuum Not Charging

Final Words

I hope this guide helps you fix the Vax ONEPWR battery charging issue. If you have any other queries, contact the Vax customer support team. They are always keen to help their customers.

Also Read: How To Fix Ecovacs Deebot Not Charging

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  1. My charger is flashing red on my vac 3 hoover

    1. If there is a build-up of debris around the brush roll preventing it from turning, then the power will automatically stop and the charge light will flash red. You should remove the brush roll and clean it.

  2. Lynda Mary Holmes says:

    The red light is flashing when I have my battery on charge as it keep cutting out when I tried to clean floor. Roller brushes are clean??

    This is virtually brand new cleaner…

    Please can you fix this yet again

    1. Having same issue and with 1 and 3 led showing up. None of these fixes the problem. Did you get it fix?

      1. Got the same problem had it with 3 batteries now, led 1 and 3 flashing believe it’s to do with running battery down to low, have had 2 replacement batteries very frustrating, that is conclusion any way but no idea how to fix it. Just rang Vax and they have replaced them free of charge on warranty

  3. Having same issue and with 1 and 3 led showing up. None of these fixes the problem. Did you get it fix?

    1. Yvonne Johnson says:

      I’m having the same problem with lights 1 and 3…. did you resolve the issue with yours?

  4. Yap Soon Hock says:

    Charger flashing red , battery show 1 n 3 white led ,
    What are the issues and how to fix it ? Battery was replaced 6 mths ago.

  5. Tracey White says:

    I have the same issue charger flashing red and battery showing white leds 1 and 3 only is this fixable or have I got to buy a new charger and battery? Please can you help? xx

  6. Barbara Lewis says:

    I have the same issue and for me it is the actual battery as the second battery is charging OK. I especially went for the PET model as it had two batteries but my vacuum is 15 months old so past warranty and I am loathe to spend £79 on a new one especially as I have had to have two replacement heads which were luckily under warranty.

    1. Lee Thurman says:

      Hi I have the same issue with one of my batteries for the blade3 pet Vax light 1 and 3 show only and red light when in charger.any ideas or suggestions please could this be jump started or is it not repairable.mine is just out of warranty and Vax are not helpful with the robot chat. Had a friend with same issue very poorly designed batteries in my opinion.

  7. Kari E Scott says:

    Same as everyone else! Used not even 5 months.. charger flashing red- 1&3 white
    Roll brush cleaned and no clogs.
    Charged for three hours.
    Starts up and dies

  8. There is a massive problem with Vax ONEPWR batteries. I was promised a replacement under warrant over 6 weeks ago. I haven’t received it, & there is no answer to any correspondence or emails or chat line help.

  9. Same issues. They will not replace my dead battery. It is still under warranty but they will not honor the warranty because I cannot find my receipt.

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