battery charger plug size?

[Brock]

I got a Rad City and really like it. Where I park the bike it is not next to a wall and I would like to extend the wire between the charger and the bike so the power brick isn't hanging in the air or lying on the ground next to the bike. I am very familiar with wiring. What I am wondering is if I get a second charger to splice longer, what is the size of the plug on the battery? It looks like a 5.5 by 2.1 but was wondering if anyone knows for sure.

On that note is the battery BMS built in to the battery or is it on the charger? As I don't want to alter the original charger (might keep it at work) can I get a "dumb" 54.6 volt supply and use it without issues?

 

[RangerDave]

Here is a link to a 16-foot charge cord extension cable :

Charging Extension Cable **Free Shipping**

Are you tired of bringing your bike or battery to the wall charger? Using the 1859 Northwest Charging Extension Cable you can extend your charging reach 16.4 feet. Each cable has male and female connectors that are 5.5mm x 2.1mm, which is a perfect fit for 90% of Ebike batteries and...

1859-northwest.myshopify.com

You could verify the plug size with Rad Support, but it looks like it will fit.


I believe the BMS is in the battery pack.

Rad has their 48-volt charger for $39. MRI- DENVER.com has one for $36.


Regards - RangerDave

 

[FocusOnBikes]

Here is another choice for 48 volt charger. This one has a switch to select from 80%, 90%, and 100% charge cycle for extending life of battery. You will have to get the proper 2.1mm barrel connector.

48v 3amp Luna Mini Charger

Distributors and builders of life changing electric bikes.

lunacycle.com

 

[tomjasz]

5.5mm x 2.1mm barrel plug, also called DC power plug. Very commonly used on inexpensive chargers.
Given the warranty and lack of a 50% setting I don’t find those $70 (shipped) chargers a good value. YMMV.

I buy packs of ten and make my own adapters. We’re seeing battery pack builders moving away from the DC power plugs. They are fine for 2A but a cursory review of their specifications seems to indicate they might not be the right choice for higher charge rates.

* (This is a connector better suited. http://www.cusmade.biz/Product/Detail/22 Note, it’s actually rated for much higher voltages and amperes.)

I use a Satiator and it’s now finishing the 4th season. There’s nothing wrong with cheap fanless chargers from Aliexpress. Great backup for 100% charges. Same as sold by many for $25-$35, $10 shipped. Just a slow delivery. Another Chinese holiday until Oct 7th.

BMS is in the battery pack.

Yes.

I would not use a long extension of the output cable. There is no indication as to wire gauge or amp rating. I’d rather use a decent quality extension cord to AC.

BTW those cables are very cheap. https://www.aliexpress.com/wholesal...ext=5.5mm+x+2.1mm+extension+&switch_new_app=y

As always, YMMV!

 

[Brock]

I did get an amazon charger https://www.amazon.com/gp/product/B07SLWTVK2/ref=ppx_yo_dt_b_asin_title_o02_s00?ie=UTF8&psc=1 with the 5.5 x 2.1 size and it works. I noticed in the reviews someone with a Rad City had been using one for a while.


I wish I had seen those 5.5 x 2.1 extensions I did end up opening the charger and adding 12 feet of #16 to it. The existing wire is #22, seems too small to me, but 2 amps and 2 feet it might be OK.

I have the extra charger is mounted on the wall and the cord runs up to the ceiling, over and hangs down about a foot off the ground where the bike usually is. It makes it easy to plug and unplug. If I want the cord out of the way I put a hook on the wall in front of the bike to hook the hanging wire in to hold it out of the way.

 

[tomjasz]

I did get an amazon charger

Typical $10 Chinese. Good move updating wiring. I wouldn’t trust the extension cables...no indication of awg.