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Today I have found the solution to put in parallel my external battery with the original battery. The goal is to raise battery capacity to have longer ride with my mini.

100_1428.JPG

You can see on this picture that the orignal battery is missing but the Mini still switch on. This is the first video about my hack, more details will follow...

https://www.youtube.com/watch?v=whoXj2hsboA

Edited by smallexis
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1 hour ago, Greg Spalding said:

If you could double my range on this particular device I would be far more than thrilled

It's very easy to do (but take a long time) and I will post all the process next time. For now, I will go outside to test this system because I just finish to install the wheels.

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38 minutes ago, smallexis said:

It's very easy to do (but take a long time) and I will post all the process next time. For now, I will go outside to test this system because I just finish to install the wheels.

i cannot wait to read about the process. thank you.

good luck with the testing.

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Ok, here are the steps to follow to put an external plug (and a switch to cut the "beep"):

prise externe 1.jpg

1: the polarity is marked on the motherboard (with respect to the connection of the battery)

2: the wires (red and black, 14AWG) are passed between the connector and the metal supports in order to weld them to the terminals of the motherboard.

3: we will drill 2 holes in the most recessed area of the platform (delimited in red)

4: the ideal location is aligned with the 2 small strokes (in any case this is where I chose to drill)

prise externe 2.jpg

 

5: by placing half of the aileron, the 2 holes lead to the "empty" space below the aileron. So this is the best location

6: the wires are passed through the 2 holes and then the motherboard is replaced. The wires remain "movable" and can slide

7: Gently pull on the wires to get as large a portion as possible

8: provisional placement of half of the aileron, in order to determine the best passage area for the wires

prise externe 3.jpg

9: to put at right side the GX12-4P socket and to the left the switch, I drill a hole of 12 mm of diameter in the two halves of the wing

10: I took as a reference one of the molded lines on the inside of the hull of the aileron, in order not to hinder the Bluetooth module and for the symmetry

11: fitting accessories, which are locked with a nut, then with hot glue for finishing

12: 2 holes are drilled under the aileron (right side) to allow the wires to be connected to the GX12-4P

prise externe 4.jpg

 

13: An XT60 connector is used to allow a removable connection between the wings and the platform.

14: on the left side, the key switch is connected in series on the red wire of the buzzer

15: the re-assembled wings is now ready to resume its place on the platform

16: the connection between the XT60 plugs being made, the whole is placed at the bottom of the wings and the latter is put in place

prise externe 5.jpg

17: without having to force, the flap is put back in its place. It's time to check if the "hack" works

18: I plug my external battery into the socket freshly installed and the mini (finally what remains) lights up

19: after having assembled the elements of the platform (excepted the wheels), I check again that everything is functional, the lighting is OK.

 

Last night, after putting the wheels and the battery in place, I charged the external battery so that it was at the same voltage as the original battery, then I go out for a test of more than 20 km. The mini works perfectly.

Modifié à l’instant par smallexis
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I am just beginning to digest this now

I am working in my office this morning and will have more time later to figure all this out

I am very appreciative for the detailed instructions

thank you so much

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i am very interested in this hack do how much extra range does it give you and can you reccomend some batteries and some cables? i dont know how to make thi it would be very helpful :D

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On 02/11/2017 at 12:09 PM, Shad0z said:

i am very interested in this hack do how much extra range does it give you and can you reccomend some batteries and some cables? i dont know how to make thi it would be very helpful :D

Hello,

In summer condition, I can drive 16km with my 240Wh internal battery that give an average consumption of 15Wh/km.

My external battery is a 190Wh, and I'm able to drive 12 extra km with it. If I had 400wh (my next project) I will be able to drive 25 extra km.

For battery and cables I bought all spares parts and I make battery by myself (I have already post some information here : http://forum.electricunicycle.org/topic/5584-want-more-range-for-your-ninebot-mini-one-problem-but-many-solutions/)

 

If you need more information, you're welcome.

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Hi smallexis, thanks for your contributions. I just bought a ninebot mini pro 260, which I selected based on the premise of 20 kmts range, but in a flat golf course just got 7 kmts with full battery ( tire pressure 45psi, ambient temperature 26°C, my weight 80 kg) . Then I found your contribution about connecting in parallel an external battery. 
I am intending to buy the following one from China, changing the charge connector to the GX12-4P.
Some doubts where I need your support, having as reference the 18 steps published by you:
(below please find the motherboard picture for the N3M260) 

- STEP 1) Question: Any clue about how to identify the positive and the negative?

- STEP 9) to put at right side the GX12-4P socket and to the left the switch
Question : How is the connection of the Red and Black cables to the GX12-4P
Question : what kind of switch are you using? 

-STEP 18)  I plug my external battery into the  socket  freshly installed
Question : are both batteries connected all the time and what is the app registering? 

I will appreciate your feedback 

Thanks 

Screenshot_20180930-210439.jpg

Screenshot_20180930-211246.jpg

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On 10/1/2018 at 4:18 AM, Apc435 said:

- STEP 1) Question: Any clue about how to identify the positive and the negative?

- STEP 9) to put at right side the GX12-4P socket and to the left the switch
Question : How is the connection of the Red and Black cables to the GX12-4P
Question : what kind of switch are you using? 

-STEP 18)  I plug my external battery into the  socket  freshly installed
Question : are both batteries connected all the time and what is the app registering? 

1 : use a voltmeter for polarity on the board

9 : for polarity you can see on charger (1 + and 2 -) :

I have use a 12V motobike key switch (in order to turn off the buzzer, it's only a noise reduction interest).

18 : the app will not detect extra capacity, just the voltage is measured. You can let both batteries connected or not.

 

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Thanks. I am buying the battery, connector, switch and a 63 volts charger.

I will keep everyone updated on the process. 

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