How Do I Know When My VEX Battery is Charged?

Published on: November 18, 2022
Written by Jonas Frank / Fact-checked by Nova Scarlett

Assuming you’re referring to a VEX Robotics Competition Battery: The first thing you’ll want to do is make sure that your charger is properly plugged in and connected to the battery. Once the charger is properly connected, the green LED on the charger will turn on to indicate that it’s working.

how do i know when my vex battery is charged

If the red LED on the charger turns on, that means there’s an error and you’ll need to check your connection. Once the charger is plugged in and working, you’ll see one of two things happen on the battery itself. For NiCad batteries, the charge level indicator will slowly rise as it charges.

For LiPo batteries, all six of the LEDs will blink rapidly at first, then slow down as it approaches full charge. You can tell when your NiCad battery is fully charged when the charge level indicator reaches 4 bars. You can tell when your LiPo battery is fully charged when all six of the LEDs are solid and not blinking.

If you’re using a VEX battery, you’ll want to make sure that it’s fully charged before you start using it. Here are a few ways to tell if your battery is charged:

1. The LED indicator on the charger will turn from red to green when the battery is fully charged.

2. You can also check the voltage of the battery with a multimeter. A fully charged battery should read around 12.6 volts.

3. If you’re using a NiMH battery, you can also check the charge by looking at the cells inside the battery pack.

All of the cells should be pointing in the same direction when they’re fully charged.

How Long Does It Take to Charge VEX Battery?

VEX Robotics batteries typically take around 4-5 hours to charge. This can vary slightly depending on the type of battery and charger being used. It is always best to consult your user manual for specific charging times.

How Do You Know When Your 12V Battery is Fully Charged?

It can be difficult to determine when a 12v battery is fully charged. There are a few things that you can look for, however, that will give you a good indication.

1First, if the battery is charging at a slower rate than usual, it is likely that it is close to being full.
2Second, if the voltage of the battery drops significantly after being connected to a charger for some time, this also indicates that it is close to being charged.
3Finally, if the charger itself stops putting out as much power as it normally does, this means that the battery is most likely full.

How Long Does a VEX Battery Last?

Assuming you are referring to the VEX Robotics Competition Battery, it will last around 3-4 hours on a full charge. The battery will need to be recharged after each use.

How Do I Charge My VEX Brain?

In order to charge your VEX brain, you will need to connect it to a computer via the USB port. Once it is connected, the brain will automatically enter charging mode and the LED will turn red. The brain will take approximately 2 hours to fully charge.

VEX V5 Battery Blinking Red

If your robot’s battery is blinking red, this means that the battery is running low on power and needs to be recharged. If you are using a NiMH or LiPo battery, you can recharge it by plugging it into a charger. If you are using an Alkaline battery, you will need to replace it with a new one.

VEX V5 Battery Not Charging

If you have a VEX V5 robot and the battery is not charging, there are a few things you can try to fix the issue. First, check that the power supply is properly plugged in and that the outlet it is plugged into is working. Next, check the power switch on the back of the charger.

Make sure it is turned to “on.” If those things are all fine, then there may be an issue with the battery itself. Try removing it from the robot and plugging it directly into the charger.

If it still does not charge, then the battery may need to be replaced.

How to Charge VEX IQ Battery?

If you have a VEX IQ battery that needs charging, there are a few things you need to know. First, make sure that the battery is completely drained before beginning the charging process. If it isn’t, you could end up damaging the battery.

To charge the battery, you’ll need to connect it to a power source using the included charger. Once it’s connected, simply wait for the light on the charger to turn green, indicating that the charging process is complete. It’s important to note that you should never leave a VEX IQ battery on the charger for more than 24 hours.

Doing so could damage both the battery and the charger.

VEX V5 Battery Charger Specs

The VEX V5 battery charger is a high-performance, rapid charger that is designed for use with NiMH and LiPo batteries. It features an LCD display that shows the charging status and has a built-in balancer for safety. The charger also includes a storage case and AC adapter.

VEX IQ Battery Charger Blinking Red

In order to charge the VEX IQ battery, you will need the VEX IQ charger. The red light on the charger indicates that it is plugged in and receiving power. When the battery is first connected to the charger, the red light will blink rapidly.

This means that the battery is charging. Once the battery is fully charged, the red light will turn solid and stop blinking.

VEX IQ Battery Not Charging

If your VEX IQ battery isn’t charging, there are a few things you can do to try and fix the issue.

  • First, make sure that the charger is properly plugged in and that the power light is on.
  • Next, check the connection between the charger and the battery – if it’s loose, try tightening it. If that doesn’t work, try using a different charger or battery.
  • Finally, if all else fails, contact VEX customer support for assistance.
vex iq battery not charging

V5 Battery Medic

If your phone is anything like ours, it’s constantly running out of battery. But with the V5 Battery Medic, you can keep your phone charged and ready to go! This little gadget is about the size of a keychain fob, and it has a built-in charging cable that you can use to juice up your phone’s battery in a snap.

The V5 Battery Medic also has a handy LED light that you can use as a flashlight, and it comes in a variety of fun colors. We’ve been using ours for months now, and it’s saved us from many a dead-battery emergency!

VEX IQ Gen 2 Battery

The new VEX IQ Gen 2 battery is a big improvement over the original. It’s smaller, lighter, and more powerful. Plus, it charges faster and lasts longer.

Here’s what you need to know about the new battery:

Size and Weight

The Gen 2 battery is about half the size of the original and weighs just over 3 ounces.


The Gen 2 battery has twice the power of the original. It can run for up to 30 minutes on a full charge.

Charging Time

The Gen 2 battery charges in just under an hour.


The Gen 2 battery will last for up to 30 minutes on a full charge.


You can tell when your VEX battery is charged by looking at the LED indicator on the charger. The LED will be green when the battery is fully charged.

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