Battery Vol Err Cell Connect

Battery Vol Err Cell Connect: Reason Explained


A new battery showing cell connections error is the last thing you want to see. But unfortunately, that’s what is bothering you now. There can be a few reasons for this.

What to do if the charger shows- battery vol err cell connect?

The reason why the charger displays this connection error is an imbalance in the cell’s balance. This is when one of the cells is more or less charged than the other. Well, you can solve this problem with a multimeter or a cell balancer. The circuit board might break and that can also be the reason behind this. 

Whichever reason caused you this mislead, we have the fix to them all. We’ve prepared the easiest guide for you to sort out this error.

Why are you wasting time? Let’s get to work!

Why Is My Charger Showing “Battery Vol Err Cell Connect”?- 3 Reasons

Let’s consider that you’ve bought a new battery for your 1/16 e-Revo. And when you give it a charge it displays that there’s a battery voltage cell connection error.

There are a few reasons why your charger can show a battery voltage cell connection error. Let’s look at some common reasons that can cause this problem. We’ve mentioned the best possible solutions alongside.

Reason 1: Improper Connection with Battery Cells

This indicates that at least one of the balance leads is not connected to the charger. This means that they are connected internally. But when they are put to charge, they can’t connect to the charger.

If you can charge 2 and 4 batteries but not 3 cells, this might happen. You can use these batteries to drive quality rally cars. What happens here is the balancing connections on the charger’s circuit board are damaged. 


If you have a multimeter and know how to solder, you may locate the detached pin. Also, connect it to a working pin to restore the charger’s functionality.

Of course, the best option is to get it repaired under warranty by your store.

Reason 2: Wrong Lead Connections for 3S and 4S

This one is almost the same as the first one. But this depends on the type of charger you are using. 

Let’s consider that you’re using the IMAX B6 charger. And the error message is showing only for 3s or 4s Li-Po batteries. And for 2s it’s okay. Here, it means that the balanced lead connections are wrong for your 4s and 3s packs.


From the problem, you should know what should be done. Yes, right, you have to balance the battery packs.

You have to make sure that the cells in the packs are equally charged or discharged. For that, you need a cell balancer. 

If you don’t have a cell balancer, don’t worry. We have that covered for you. Here are some of our picked cell balancers that are best in the line.

Product 1
Product 2

We hope you chose the right one for yourself. 

If you’ve got the equipment, let’s see what we can do. 

First, we have to plug the device into the battery pack. Be careful of the polarity. The center pin plug goes into the center hole of the pack. And the positive and negative plugs follow their respective holes.

The 2-cell led on the device should light up. This means that the device is now balancing the batteries. It measures which cell has higher or lower charges. And discharges it to the same level.

When the balancing is done, all the 3 LED lights should light up. That’s when you’re done.

Reason 3: There’s a Break in the Circuit

If you’re using an IMAX B6 charger, you might have a break in the circuit board truck. This means that the negative and positive can break in the circuit.


To fix this, you need to do a bridge. From one of the little pins on the back of the board,  make a bridge with copper. For copper, we mean a copper wire. 

Join the bridge to the connection and the bottom of the horizontal circuit board. This will complete the circuit.

Tips To Avoid Battery Voltage Cell Connection Error

We have told you what to do to solve this problem. But let’s see how we can stop your charger from showing this error message again. So let’s look at some quick tips-

  • The cell balancers come with two additional cables. You can connect them to your charger at the time of charging. In this way, the cells will always take a balanced charge.
  • While making the bridge, make sure to follow the tracks. You can also measure them with a voltmeter. This will keep them from showing any errors in the future. 
  • Make sure you are charging in the correct mode. Sometimes if you try to charge your LI-Po batteries in NiMH mode, it will show errors. So be aware of which mode you are charging your batteries in.

We hope you keep these tips in mind. With this, we have finished all about battery voltage cell connection errors. Hope it helps you with understanding Li-Po batteries better.


Question: How do you check the LiPo balance plug?

Answer: To check this, you need a multimeter. So put the multimeter on VDC 20 or volt DC 20. Check all the individual cells. The second cell is always going to have double the voltage of the first one. And it will continue multiplying.

Question: Why are there three wires in Li-Po batteries?

Answer: The third pin on Li-Poly batteries is necessary for the battery to be charged safely. This is due to the fact that these batteries are usually multi-cell. As a result, the third pin is utilized to balance the charge between the cells.

Question: What is the purpose of the yellow wire on a lithium-ion battery?

Answer: The + and – battery connections are represented by red and black respectively. Often a yellow wire is seen connected to a Li-Po battery. The yellow wire serves as a sensing wire for providing corrective information to an off-board charger.

Question: What does the T sign on a battery stand for?

Answer: T is most likely a circuit on the inside to sample the temperature of the charging battery. If things become too heated, it shuts down the charge and sounds like an alert. 

End Words

Now you should’ve found your explanation for your charger showing battery vol err cell connect. We hope our solutions could help you fix them too. If you keep our tips in mind, you might even not have to face this problem again. 

If you still have any confusion, or we couldn’t answer you entirely, feel free to contact us. We are always ready to step forward. 

We hope you do well. Till then, all the best!

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