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DATEx2 Parallel Battery Adapter

£124.99£674.99

In stock

(20 customer reviews)

The DATE Dx (also known as DATEx2 or DATEx3) safety devices allow you to safely connect up to three eBike batteries in parallel.

Running eBike batteries in parallel will boost your performance, range and protect your batteries.

Step 1: Select how many batteries you will be running in parallel?
Step 2: Do you wish to charge all of your batteries, on your bike, at the same time?
Step 3: What is your controller’s maximum amperage ≤ (equal to or less than) 30 amps, 60 amps, or 90 amps.

This product will NOT be suitable if your bicycle has regenerative braking. Please, ensure your batteries are able to be charged via their discharge port if you purchase a DATEx2 device with charge function!

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Description

General Overview

The DATE Dx devices allow you to safely run two or three eBike batteries in parallel, at the same time with complete peace of mind and total safety.

With the DATE Dx device, you can combine any battery, for example, 52V with 48V or even 36V, regardless of their chemistry, voltage, state of charge, or capacity as long as the controller supports the voltage and the hard-limits are not exceeded.

Although it may seem simple, adding additional batteries to your eBike is a major challenge. Connecting eBike batteries in parallel, without the DATE Dx device, can be EXTREMELY dangerous. For example, if the batteries have different voltages, chemistry, and or state of charge you risk permanent damage or in extreme circumstances explosion or fire!

The DATE Dx solves this: You can now combine batteries that have different chemistries, voltages, outputs, and or state of charge. The device will manage everything and protect your ride.

The DATE Dx devices are weatherproof. You can place the device anywhere you wish. Ensure the device cannot be knocked or damaged while riding so avoid installing the device where this type of damage could occur.

The devices only get warm during use so can be safely stored within a bicycle bag or similar.

Since weight is a large factor when cycling, you can easily remove any of the batteries for short rides and replace them when you need to travel for longer distances.

When using two different voltages, the DATE Dx will use the battery with the higher voltage first, then engage the 2nd/3rd battery when within the lower voltage battery’s charge.

For example: If you combine a 52V and 48V battery, the DATE Dx will take current from the 52V battery first. This is because a 52V battery, fully charged has an output voltage of around 58V. When the 52V battery reaches 54V, matching the fully charged voltage of the 48V battery, both batteries will work together until around 43V at which point the 52V battery’s low voltage cut-off will be reached. After 43V, only the 48V will contribute. As a result, we recommend manually turning off your 52V if it does not have an intelligent BMS.

There are a total of 12 DATE Dx devices to suit almost all applications.

Step 1 – How many batteries do you wish to run in parallel?

Up to two batteries

The DATE Dx2 range of products is best suited for running two batteries in parallel.

DATE Dx2 – connect up to two batteries and two controllers or one controller and an auxiliary out to this device

DATE Dx2C– connect up to two batteries and two controllers or one controller and an auxiliary out to this device as well as the charge function. This means you can charge both your batteries, at the same time, using one charger.

* ensure your batteries can be charged via their discharge port.

Up to three batteries

The DATE Dx3 range of products are best suited for running three batteries in parallel.

DATE Dx3 – connect up to three batteries and two controllers or one controller and two auxiliary outputs to this device

DATE Dx3C – connect up to three batteries and two controllers or one controller and two auxiliary outputs to this device as well as the charge function. This means you can charge both your batteries, at the same time, using one charger.

* ensure your batteries can be charged via their discharge port.

Step 2 – Charging Function

Do you wish to charge your batteries, at the same time, from one charger? This is a great feature if you do not wish to carry multiple chargers with you if you are out and about.

You can also use a high-powered charger since the charge load will be distributed across all of your batteries.

Step 3 – Controller output.

You must check and confirm what your controller can output in amps.

Your controller should provide an indication of its maximum output. For example 22 amps or 35 amps and so on. There is normally a sticker on the controller from the manufacturer.

Now you can select a DATE Dx device with the appropriate amperage from a choice of three – 30 amp, 60 amp, or 90 amp.

The Charging port on the DATE Dx devices is always XT90S anti-spark female plug.

You can use your own charger with an appropriate cable adapter that we can also provide. 

The performance boost is achieved by reducing something called voltage SAG.

Voltage SAG occurs when you suddenly draw a lot of power from the battery. For example, if you are at a junction and need to accelerate quickly, your voltage might go from 54v to 48v. That’s a drop of 6 volts.

This phenomenon is known as voltage SAG. If we can reduce voltage SAG then we can increase speed, power, and performance.

Higher voltage = higher speed

Higher current/amps = higher torque (acceleration)

Higher power (voltage x current/amps) = higher force to ride you and all the weight you have with you, including the eBike itself.

If you are using one battery and you notice a voltage drop of say 6 volts, then with 2 batteries that will halve to 3 volts and with three batteries that reduces further to 2v.

Let’s assume you are using fully charged 48v batteries. Fully charged these should register around 54.5v.

One battery – 6v SAG

54.5v – 5v = 48.5v

48.5v x 30 amps = 1,455 watts

Two batteries – 3v SAG per battery

54.5v – 3v = 51.5v

51.5v x 30 amps = 1,545 watts

A performance boost of 90 watts compared to one battery

Three batteries – 2v SAG per battery

54.5v – 2v = 52.5v

52.5v x 30 amps = 1,575 watts

A performance boost of 120 watts compared to one battery

Since the voltage SAG drops, all that extra voltage will give you more power, torque, and speed.

Note: The voltage SAG depends on the C rate of the cells. Some are 10C, 15C, 20C, and so on. Where C = the capacity of the cell. So when they discharge instantly, they can supply xC Amps instant current.

In practice, if I get 30 miles with one battery and 30 miles with the second one, by joining them together I should get 60 miles, right? Wrong, because the load is split across the batteries then they are under less stress so you can access more of the batteries’ stored capacity, safely.

On average, our tests have shown around a 20% range boost so using the above example – 60 miles becomes 72 miles! Not bad, right!

Of course, there are many factors that determine the range, but this is a real-world example that we have experienced, on flat terrain, on the same route with the same rider.

24V, 36V, 48V, 52V, 60V, 72V batteries along with your existing batteries, or any battery or combinations you might have, as long the voltage is 24V to 84v. 

For optimum performance – use batteries with the same voltage. For example: 48v + 48v, 52V + 52V or 72V + 72V battery.

It is totally possible and a great benefit to using that old 48V battery together with your new 52V battery.

When you use a 52v battery and 48v battery then the 52v battery will be used first until its voltage is the same as the 48v battery at which point the batteries will run at the same time until the 52v reaches its low voltage cut off e.g. 42V.

We recommend manually turning off the 52v battery (via the key or on/off switch) when it reaches its low voltage cut-off.

It is not practical to mix batteries with large voltage gaps, for example mixing a 72V battery with a 52V battery since their discharge cycles are completely separate.

For example, the 72v battery voltage range (full to empty) is 84V down to 60V and for the 52v battery 58.8V down to 42V, so the DATE Dx device won’t bring any extra range boost benefits in here, except the fact that you could have both batteries always connected into the system.

In this case, you need to manually turn the 72V off when it reaches 60V (when it reaches 60V while riding, not while stationary).

In this case, the voltage drop when riding (SAG) will be the same as with a single battery until the voltage is the same across both batteries and then the voltage SAG will drop in half (with identical capacity batteries – Ah, or proportional to each battery otherwise).

With the help of the DATE Dx devices, you could safely mix different chemistry batteries – such as Lithium-Ion, LIPO, LIPOFE4, etc.

It makes no difference whatsoever, but the same low voltage rules apply as when mixing different batteries – that is you need to manually turn off the higher voltage battery when it reaches its minimum voltage usage threshold while riding.

It doesn’t really matter what voltage your batteries are when you connect them to the DATE Dx device.

It is always the higher voltage battery that will be used first and then both together when their voltages match.

When charging them through the DATE Dx2C or Dx3C, the opposite will apply, the lower voltage charged battery will be charged first until they will both reach the same voltage and then both will split their charging based on their capacity e.g. ⅓ + ⅔ for 10Ah + 20Ah batteries together or ½ + ½ when the Ah is identical.

*Beware that some BMS requires you to wait 10 seconds after turning your battery OFF and before turning them ON again.

The DATE Dx devices can be installed in just about any location on your bicycle. Often, we suggest having the DATE Dx near your controller to reduce the amount of wiring. Less wiring makes for a neater setup.

Once installed, DATE Dx and adapters do not need to be unplugged again.

The heat produced by the DATE Dx is negligible therefore no additional cooling is required. Store the DATE Dx device in a cycle pouch, within your frame, zip-tied to your seat post, it does not matter.

You can now charge both your batteries, at the same time via the DATE Dx device.

  1. You can charge your batteries on or off your bicycle.
  2. You can charge your batteries one at a time or all at the same time with each of the batteries’ individual chargers.
  3. This greatly increases convenience as you only need to travel with one charger.
  4. We recommend thinking about a higher powered charger when charging more than one battery since most ‘stock’ chargers only provide 2 amps which means it can take a very long time to fully charge large capacity batteries.
  5. The DATEx Dx devices manage the charge to each battery so you do not have to worry.
We have a large selection of adapters available to easily and effortlessly connect your DATE Dx to your batteries and controller. You can view our adapters here

View adapters here

DATEx2-Dx2-Use-Example

The DATEx2 Dx2 suitable for use with up to 2 eBike batteries but does not have the charge function so the batteries must be charged individually on or off the bicycle.

In this example:

  1. RAD Male to XT60 female – 50cm length. This connects your 2nd battery, perhaps mounted on your rear rack to the DATEx2 device.
  2. RAD Female to XT60 male. This connects the DATEx2 device to your controller.
  3. RAD Male to XT60 female. This connects your primary/frame battery to the DATEx2 device

The DATEx2 Dx2C suitable for use with up to 2 eBike batteries includes the charge function so the batteries can be charged at the same time in-situ or individually on or off the bicycle.

In this example:

  1. RAD Male to XT60 female – 200cm length. This connects your 2nd battery, perhaps mounted on your rear rack to the DATEx2 device.
  2. RAD Female to XT60 male. This connects the DATEx2 device to your controller.
  3. RAD Male to XT60 female. This connects your primary/frame battery to the DATEx2 device
12 Reasons to get the DATEx2 parallel battery adapter and why running two or three batteries in parallel, rather than one at the time, is the way forward for performance and range boost!
  1. More Power – 1/2 or 1/3 voltage SAG decrease! E.g. instead of a 6V drop when applying full power, the voltage drop will be 3V respectively 2V. That means 3V/4V x current assuming 30A = 90W (120W) more power! And that is across all the battery discharging curves.
  2. Higher average speed – Literally always riding 3-4V faster because of the same cut in half/third voltage SAG.
  3. Lower temperature on your battery – Each battery will only work at 1/2 respectively 1/3 of the load. All that heat with a single battery means wasted energy as heat. In our tests, the battery temp dropped from 70°C to 52°C.
  4. Longer battery ride – Since you will now boost your range, you will charge more often to just 90% or 80% of both batteries, and they will always work at half the load, so their life span can be considerably improved. Still at least once per week charge you 100% so that the BMS will get a chance to do the load balancing, properly at low current E.g., 2amp overnight.
  5. RANGE! – All the wasted heat and SAG will now become extra RANGE! In real world we did 30 miles per battery and 70 miles with the Dx2. So 10 extra miles by just riding with both batteries together via Dx2. And also, more powerful and a bit higher average speed.
  6. Peace of mind – You just plug it once and forget.
  7. Charge with a single more powerful charger at once – charging multiple batteries with one charger, at the same time, with the DATEx2 DX2C or DX3C. Take a single charger with you on your long trip hauls. And don’t mess with 220V/110V splitters, two/three chargers, and all that cables mess and extra weight!
  8. Lightweight control! – Yes, you can decide how many batteries you want to ride with. 1, 2 or 3 is that easy, depending on the needed range/power/route. Maybe you are going on a short ride, so leave two batteries at home and ride with just one. Not a problem.
  9. Make most of your batteries – by mixing your old 48V battery with your newer 52V ones without worrying.
  10. Plug and forget. Always ride at peace of mind!
  11. Stop swapping batteries – especially batteries in the frame or cradle which are hard to be swapped, especially in rain or nasty weather conditions.
  12. Get more output ports! – 
Need to plug your fancy powerful light?
Need to plug your 2WD second controller?
Or maybe your controller temp measuring device?
Or perhaps your 12V DC to DC step-down converter?
Absolutely no problem.
You get two output ports with Dx2/Dx2C and three ports with Dx3/Dx3C♥️
Bottom line?

Forget about any range anxiety. Increase your power output. Protect your batteries! Just plug in, tidy up the wiring and forget. Focus on your improved riding experience!

Note: Batteries and adapters are not included. These are bought separately.

Let us know in the form below

Additional information

Weight .1 kg
Dimensions 5 × 5 × 2.6 cm
No. of Batteries

Two Batteries, Three Batteries

Charging Function

Yes, No

Amperage

30 Amp, 60 Amp, 90 Amp

20 reviews for DATEx2 Parallel Battery Adapter

    R***S
    17/10/2021
    Hello, just wanted to thank you guys for your assistance in my recent purchase of wiring.  Your personal attention to helping me says a lot about your...More
    Hello, just wanted to thank you guys for your assistance in my recent purchase of wiring.  Your personal attention to helping me says a lot about your company.  You asked for some pictures of the e bike and battery connectors and custom made one for me so much thanks. Randy
    Helpful?
    0 0
    DATEx2 Parallel Battery Adapter photo review
    chouinpa
    30/08/2021
    DATEx2 connect original 14.4AH and rear rack 20AH additional battery
    The DATEx2 allowed me to connect the original 14.4AH and rear rack 20AH additional battery in parallel. Works flawlessly and I now have decent range. ...More
    The DATEx2 allowed me to connect the original 14.4AH and rear rack 20AH additional battery in parallel. Works flawlessly and I now have decent range. I'm a very heavy rider and was draining the original battery on my Rad Mini 4 way too quickly, now I have enough range to get too tired before running down the battery. Awesome device sold by an awesome company, thank BGM' for your great service and products.
    Helpful?
    2 1
    DATEx2 Parallel Battery Adapter photo review
    joethebohemian
    27/08/2021
    Simply amazing
    Don’t think too much! Just get it :)
    Helpful?
    2 0
    joethebohemian
    11/08/2021
    Great product
    An essential bit of kit to connect two batteries in parallel. Highly recommended
    Helpful?
    1 0
    armymen77
    03/08/2021
    Amazing
    This is an amazing piece of kit, not only did I triple my mileage, but the charging time is far less either!! I have no more doubt with how far I can ...More
    This is an amazing piece of kit, not only did I triple my mileage, but the charging time is far less either!! I have no more doubt with how far I can go now. And if the charging time is less, then it saves your batteries on the long run.

    More out your batteries, this device is a must!!
    Helpful?
    1 0
    DATEx2 Parallel Battery Adapter photo review
    J***R
    24/07/2021
    Got my DateX2 in a week's time to the Eastern US from Gareth S. At Big Game Bikes in England. Temporary dual battery mount on a stock Rad battery tray...More
    Got my DateX2 in a week's time to the Eastern US from Gareth S. At Big Game Bikes in England. Temporary dual battery mount on a stock Rad battery tray on top of the rack (4x through bolts). Will likely drop it underneath and upside down in the next wrench session. Waiting on my Bolton 35Amp controller/display.

    Will be putting the range to test tomorrow. DateX2 claims >2X range in parallel over using two batteries one at a time, due to efficiencies of the load being distributed to both batteries at once. (I'm just happy to have the second battery hard mounted and wired in, instead of in a padded bag on the rear rack.)

    Solid thanks to Gareth for taking the time to correspond about the order and include all the adapters to make it a truly plug-and-play install!
    Helpful?
    0 0
    DATEx2 Parallel Battery Adapter photo review
    DATEx2 Parallel Battery Adapter photo review
    DATEx2 Parallel Battery Adapter photo review
    +1
    king40
    23/07/2021
    This thing is amazing
    Connected two stock Rad Rover Batteries ! I’m so pleased with the performance and mileage increase!!!
    And no longer have battery anxiety!!!
    Helpful?
    2 0
    Stephen Potter
    21/07/2021
    DATEx2
    This is an extraordinary device, worth every penny if you're running two or more batteries. If nothing else, it removes the fear of voltage sag, leavi...More
    This is an extraordinary device, worth every penny if you're running two or more batteries. If nothing else, it removes the fear of voltage sag, leaving only range anxiety to contend with :-) let's hope some giant doesn't come in, buy the developer up and put the price up as a consequence.

    I live in a very hilly area and this little magic black box also gives extra juice to the motor which helps too.

    And if only there were more people like Gareth running businesses. Friendly, helpful, knowledgeable and funny - I have benefitted hugely from his generosity of time and advice on many occasions. Top bloke, top company.
    Helpful?
    5 0
    mark.blyth9
    19/07/2021
    Datex2
    I'm running 2 batteries now with the Datex2.I knew there would be more range .But my speed has gone up 5mph!
    Quick delivery and great piece of kit.
    Helpful?
    2 0
    M***A
    16/07/2021
    This Datex2 is amazing, after I upgraded my motor and controller on my RadRover my pedal assist didn’t work very good at all for some reason, I’ve hea...More
    This Datex2 is amazing, after I upgraded my motor and controller on my RadRover my pedal assist didn’t work very good at all for some reason, I’ve heard others say the same thing, now that I have the Datex2 installed pedal assist works again (crazy) only better then it ever did, and the distance I get from two 52v battery’s hooked to this device has totally removed my range anxiety, I take long rides out in the country and still have power to spare by the time I get back home, people that don’t have the DateX2 installed are really missing out, it’s like giving your bikes electrical system a professional tuneup.
    Helpful?
    1 0
    Paul Comerford
    07/07/2021
    Great service
    I received my Datex 3 device really quickly, great service. Using 3 batteries on my BBSHD bike, 2 x 48v and 1 x 52v. I've only just got around to fitt...More
    I received my Datex 3 device really quickly, great service. Using 3 batteries on my BBSHD bike, 2 x 48v and 1 x 52v. I've only just got around to fitting in but all looks good so far. Need to take on a long test run to test range.
    Helpful?
    1 0
    DATEx2 Parallel Battery Adapter photo review
    DATEx2 Parallel Battery Adapter photo review
    DATEx2 Parallel Battery Adapter photo review
    DATEx2 Parallel Battery Adapter photo review
    +2
    M***A
    07/07/2021
    Got my DATEx2 today, going to put my two 52v 20 amp Bolton triangle battery’s together in parallel on my RadRover using it, it’s supposed to increase ...More
    Got my DATEx2 today, going to put my two 52v 20 amp Bolton triangle battery’s together in parallel on my RadRover using it, it’s supposed to increase mileage by slowly sipping from each battery, will let everyone know the results of this little device from Big Game Bikes.
    Helpful?
    4 1
    DATEx2 Parallel Battery Adapter photo review
    DATEx2 Parallel Battery Adapter photo review
    DATEx2 Parallel Battery Adapter photo review
    DATEx2 Parallel Battery Adapter photo review
    DATEx2 Parallel Battery Adapter photo review
    +3
    M***B
    18/06/2021
    I have 2 different batteries on my 2020 Radrover 5 ebike. The first one is the original 48v battery and the other is a 52v rear rack battery.

     It w...More
    I have 2 different batteries on my 2020 Radrover 5 ebike. The first one is the original 48v battery and the other is a 52v rear rack battery.



     It was super easy to hook with Gareth's easy instructions. The 2 inputs are for the batteries to plug in. The 2 outputs are for 2 separate controllers. If you only need one controller, the other is not used.




    I turn the rear rack battery on first and then the front battery before powering up my 35 amp Bolton controller. The bike seems to go forever with the 2 batteries.




    There is nothing on the market that can do what the DATEx2 does. I don't worry about my batteries knowing how reliable the device is. It is well worth the money considering the peace of mind you get.
    Helpful?
    4 0
    mbrumfield59
    16/06/2021
    Radrover 5 battery adapters
    I purchased the battery adapters from biggamebikes and it made it a breeze to install the DATEx2. Literally plug-and-play.
    Helpful?
    3 0
    mbrumfield59
    16/06/2021
    DATEx2 is the future for dual battery upgrades
    I have a Radrover 5 ebike and so does my wife. I recently bought 2 rear rack batteries to extend our range. Mine is a 52v battery to go with my 48v Ra...More
    I have a Radrover 5 ebike and so does my wife. I recently bought 2 rear rack batteries to extend our range. Mine is a 52v battery to go with my 48v Rad battery.



    I heard about the DATEx2 and that it allows you to hook up 2 batteries no matter what the voltage is, the range, or charge level.



    Gareth from biggamebikes explained how to hook it up and it was easy to install. It is amazing and the only device on the market that does what it does.



    The DATEx2 gives me peace of mind and we'll worth the money.
    Helpful?
    5 0
    DATEx2 Parallel Battery Adapter photo review
    DATEx2 Parallel Battery Adapter photo review
    DATEx2 Parallel Battery Adapter photo review
    DATEx2 Parallel Battery Adapter photo review
    DATEx2 Parallel Battery Adapter photo review
    DATEx2 Parallel Battery Adapter photo review
    DATEx2 Parallel Battery Adapter photo review
    +5
    J***B
    13/05/2021
    Gareth has just spent 2 hours upgrading my RADRhino step-thru and what a difference! Fincci tyres, 35 amp controller and display upgrade, upgraded hyd...More
    Gareth has just spent 2 hours upgrading my RADRhino step-thru and what a difference! Fincci tyres, 35 amp controller and display upgrade, upgraded hydraulic brakes and DATEx2 fitted. I could not be happier!
    Helpful?
    9 0
    DATEx2 Parallel Battery Adapter photo review
    DATEx2 Parallel Battery Adapter photo review
    DATEx2 Parallel Battery Adapter photo review
    +1
    A***f
    13/05/2021
    I’ve just fitted a second battery to my Rhino along with a DateX2 my egg rider is showing over 80 miles range on pedal-assist 3 which is very impressi...More
    I’ve just fitted a second battery to my Rhino along with a DateX2 my egg rider is showing over 80 miles range on pedal-assist 3 which is very impressive. I’m now looking for advice to fit the battery carrier in a good and secure way. It’s currently bolted down and then with a cable tie at the other end but I’m after something that’s more secure and better looking. The DateX is fairly secure and is cable tied in....... Any experience or thoughts on this 😊👍
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    3 0
    DATEx2 Parallel Battery Adapter photo review
    DATEx2 Parallel Battery Adapter photo review
    DATEx2 Parallel Battery Adapter photo review
    DATEx2 Parallel Battery Adapter photo review
    +2
    M***F
    21/04/2021
    2 x 52v batteries. 21 Ah + 14 Ah. Runs better than new. Faster response time on the throttle. I did 56miles on peddle assist 2 And throttle. Only used...More
    2 x 52v batteries. 21 Ah + 14 Ah. Runs better than new. Faster response time on the throttle. I did 56miles on peddle assist 2 And throttle. Only used 4volts from 58. Unbelievable!!!!!!!
    Helpful?
    6 1
    DATEx2 Parallel Battery Adapter photo review
    DATEx2 Parallel Battery Adapter photo review
    DATEx2 Parallel Battery Adapter photo review
    DATEx2 Parallel Battery Adapter photo review
    DATEx2 Parallel Battery Adapter photo review
    DATEx2 Parallel Battery Adapter photo review
    DATEx2 Parallel Battery Adapter photo review
    +5
    G***p
    30/03/2021
    Absolutely brilliant. Running two 48v batteries - 14ah and 13ah. I can charge both batteries, at the same time from one charger. Charge time is about ...More
    Absolutely brilliant. Running two 48v batteries - 14ah and 13ah. I can charge both batteries, at the same time from one charger. Charge time is about 14 hours but Gareth said he can source 5 or 10 amp fast chargers which will reduce charge time. Such a great investment!
    Helpful?
    10 0
    T***g
    25/03/2021
    Essential piece of kit if you run more than one battery!!
    Just wanted to update you, install went very well. Everything is working perfectly, throttle, PAS, headlight, etc. The screen recognizes both batterie...More
    Just wanted to update you, install went very well. Everything is working perfectly, throttle, PAS, headlight, etc. The screen recognizes both batteries. Installed under the crank tube and covered with the skid plate for protection. Again thank you very much.
    Helpful?
    8 0

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