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Buyers Guide – Balancer Harness

Buyers Guide – Balancer Harness

When charging LiPo and LiFe batteries you need to make sure to balance charge them once in a while or even at every charge to make sure all cells in a pack have the same voltage level as too low or too high voltage values can lead to dangerous battery conditions.

Most of today's LiPo and LiFe-compatible charger feature an internal balancer, a unit and software feature that equals the voltage of the cells, making sure they are at the same level. To use this feature a balancer harness is needed that allows the charger to "read" every cell in a battery pack.

When searching for the correct balancer harness for your battery and charger you need to keep attention to several points as are the type of your battery's power connector, the balancer connector type as well as the respective connector types on your charger.

The most common battery connect types are the 4mm and 5mm bullet-type connectors, the so called T-plug (also known as Deans connector) as well as the Tamiya-style Molex plug and a few other such as the Traxxas TRX and iD connectors.

On the balancer side of things the most common types are the very common JST-XH and not-so-common JST-EH plugs while the respective connector for chargers is called Polyquest or PQ, although there are also devices that use JST-XH connectors. As you can see this can already cause some confusion as at time the terms are mixed up.

Now, when you are looking for the perfect balancer wire for you, first check the balance connector on your charger. Refer to the supplied manual or information given on the manufacturers website to see what connector type you are after. Say your charger uses the Polyquest connectors you then look after the respective balancer port on your battery pack. When using competition-type batteries, you will likely find an internal 2mm tube-type connector port while many "sports" batteries are equipped with external XH or EH balancer ports. Finally you only have to detect the type of battery connector your battery has.

With the given information you can now look after your perfect balancer and charging harness. EuroRC offers a wide range of pre-wired balance harnesses and even adapter wires if you did not find a pre-configured one. 

Charging industry-standard 2S LiPo packs requires most likely a harness such as Vampire Racing's 2S charging wire with EH/PQ balancer port, stepped 5mm/4mm bullet-type connectors and 2mm balance connector.

Traxxas battery packs use their own TRX iD connectors with integrated balancer connection and saddle pack battery packs require a harness with integrated jumper wire. Most of the wires come with XH or PQ balancer connectors for the charge side, meaning you can either use them directly with the charger or with the addition of – most likely included – balancer boards/adapters. When using "sport" battery packs with external balancer connector, you can plug those directly into the balance board/adapter. If your charger comes without a balanced board, you can get a multi-balance board for EH, XH, TP/FP and HP/PQ balancer connectors here. It is usable with 2S to 6S battery packs and thus should meet virtually every RC car related need.

As for the battery connector, competition packs will likely use 4mm or the newer 5mm bullet-type "tube" connectors while sport packs will use T-type "Deans" or XT60 connectors. Most pre-configured balancer wires come with either bullet- or T-plug connectors while XT60 and other "less usual" plugs require respective adapters.

If you are unsure what harnesses or adapters to use with your battery, feel free to contact us!

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All products listed as “in stock” are in our warehouse and ready to be shipped within the next day. Exceptions to this are pre-orders and possible, but unlikely, errors in stock numbers. All products include the Finnish VAT (24 %). Prices are subject to change without prior notice.

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Estimate Shipping times with GLS.

An international GLS parcel is delivered to neighbouring states of Finland like Sweden or the Baltic countries in a standard delivery time of 24 to 72 hours. To more distant European countries the international parcel dispatch takes between three and six working days, to remote areas up to eight days. Rough estimate is 1 week from order to delivery.

Please note that GLS shipping time is calculated in working days (Monday to Friday) and excluding the day when parcel is shipped.
Here you can find estimated delivery times.
Note! Here you can find collected statistics about average delivery times.

Estimated shipping times by DHL and UPS

DHL Express and UPS Express are our fastest delivery options. Both options can reach almost anyplace in EU in 1 day, but some places take 2 days.
• Depending what kind of products you want to order the shop will let you choose from available shipping options.
• Both Options are also Door To Door Services. The Courier will deliver the parcel to your door. But they also have pickup points where they might drop your package off so you can pick it up when it suits you.

When you are checking out your order you can see a more precise estimate of each shipping option to your country.

Refund policy

We accept returns of new, unused merchandise within 14 days from the delivery. Please contact us at [email protected] to receive return information. The customer is responsible for any return costs unless otherwise agreed to with our customer service. We try to return the money with the same payment method that was used to pay for the order, if its not possible we make a wiretransfer. You can also request a gift card if you are making a new order to speed up the process.

We also accept returns after 14 days upto 50days, but we refund them with a giftcard to our shop so you can replace them with any products we sell. Please contact our customer service for details.

After we receive the merchandise and verify its re-sellable condition, we will refund the money or give you a giftcard. Depending on the item this will take 1-3 days after we have received the item. If there is a delay we will contact you.
Note! Every return made without notice via email will be charged with handling fee of 20€. Handling fee will be reduced from the total refund.

Damaged Shipment

In the rare occurrence that the shipment has been damaged, please take pictures and send those to our customer service [email protected] immediately and we will make sure we get you sorted and back to enjoying our hobby. Also notify the courier bringing you the shipment that it has been damaged.

Defective parts

If you feel that your product is defective please send us a email and we will let you know what to do next. Most items do not have a warranty as they will break in normal usage. For example if you hit something solid or take a larger tumble. Properly used items should easily last 3-12 months and during this period we are able to replace broken items if they have a manufacturing or material fault. We have years of experience with different makes and they all have different warranty policies. We have chosen to work with brands that have a good understanding how to serve their customers and you can be assured that you will get the best customer experience possible with us.

We do not replace or exchange products that are not defective or broken by improper use or have not been maintained. But we do help and teach you how to do things properly so you do not break anything in the future, just email us and we will help you out. We are however unable to wrench for you, its part of the hobby so its important that you will learn that part also your self, we have great tools to sell you so just ask us what you need.
Note! Many manufacturers are strickt that electronics are not allowed  to be modified (connectors changed etc.) without disabling the warranty. Remember to check this from your products manual.

Don’t worry you are safe with us! Most of our customers feel that they get excellent service in the rare occurrence that they encounter a problem with the product they have bought.

And remember if you run in to a problem or you feel that there is a problem with arrived products do not hesitate to contact us. We are here to help and we do our best to sort it out as soon as possible.

What happens if EuroRC made a error in the shipment?

We ship a lot of orders each day and rarely there are errors. We do however try to minimize the effect on the customer. Please contact us immediately if we have made an error and we will make it right.

Address for returns

Always contact us before returning any product, we can not take responsibility for shipments that are sent without prior notice. Its very important that we can tell you how to mark the parcel so it will be processed in a timely fashion.

EuroRC Oy
Päiviöntie 8
12400 Tervakoski

[email protected]