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Davide Busetti

battery power dies after 1 minute, not lasting

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I recently got from a friend an original ( maybe 2015 ) fatty,. Pretty teal color but he told me it doesn't work. I read some of the posts of this excellent forum.

Here is my plan.

1. I bought a cheap meter from amazon and will check if the battery  ( canister) is the problem, the led display on top seems to indicate it is full.

2. I f that's not the  problem I will purchase a new controller to replace for  the 350W motor . Do you have any recommendation? . All I seem to find is the ones on eBay from china that take forever to get here.

My question is , after battery and new controller, what would be my next step?  I REALLY appreciate any suggestion , especially if it is specific.

 

Thank you !!

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The Battery is the place to start and if you have keys to the battery, remove it and look for damage on the plastic surrounding the contact points on the battery and cradle. If you can’t remove the battery, check for voltage between the battery & controller with the battery switch on by piercing the wires with the multimeter probes, that’s why they have sharp points. You didn’t mention if your throttle LEDs are lit with the battery on and the power button depressed on the throttle?

LEMMENO

FA7A23E0-74C1-4EF0-8B8C-C24323DEFC9C.jpeg.2346c8a9b61b7fbf10ea6fde6a79d74c.jpeg

               REDDY

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Yes the throttle leds are all on and the power button depressed. At the beginning i get a little kick, but it dies right away. As soon as I get the meter I will send you the reading for an opinon

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If the Throttle is powered (it’s not motor power, just a small control current) there is power getting to the controller but the controller and motor itself are the likeliest device failures. Carefully snap the top off the throttle and look for any broken or displaced wires Inside. Has the bike been exposed to water; left outside, or ridden in the water?

Make sure the large Higo Motor Cable on the right chainstay is properly connected with no bent pins inside. 

A28EDD3E-259F-49C2-AF12-23DE78C41A44.jpeg.6cf6239f64b9fdc300ac2e7c611f7f9c.jpeg

         REDDY

 

 

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Higo motor cable properly plugged in, didn't t se any bent pins. Throttle wires seem good  ( i attached pics). I'm thinking , hoping controller issues. Do I have to buy the 85 dollars from their web sites or do you have any reccomendation for the original 2015 fatty model?

Thnak you!

IMG_9463.JPG

IMG_9464.JPG

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No because now is the perfect time to upgrade to a 20 or 25Amp controller, if we can determine that the motor is good. To do that, well need to measure current or not, with you coming multimeter in side the High connector you inspected today. Does the motor rotate both forwards and backwards with the chain off the Freewheel. Does it make any noise while turning it or any clunky resistance or binding. 
F041D007-0236-48C6-9F4A-4C6484D1B7C2.jpeg.00e012adf5e04768a1ab0db40e872129.jpeg
                        REDDY

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Does the motor rotate both forwards and backwards with the chain off the Freewheel. Does it make any noise while turning it or any clunky resistance or binding. 

FA7A23E0-74C1-4EF0-8B8C-C24323DEFC9C.jpeg.2346c8a9b61b7fbf10ea6fde6a79d74c.jpeg

          REDDY

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no particular sound or resistance on the motor. I'm really thinking it's the controller. you can hear a whizzing sound coming form the traingular box, like it wants to work bu tit doesn't. Do you have any reccomendation on which one to choose to replace this one in the pic?

Thank you!

IMG_9456.JPG

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You can do better than the 500w bafang and install the insides of the 750w bafang in your existing case. And you should buy the 25Amp or 35Amp controller compatible with the lg Higo connector for the 750w Bafang. Only the 20 amp or 25 amp controller with the small Higo connector are compatible with the 500w Bafang but I’ll have to verify that with Electro Bike World. https://electrobikeworld.com/t/sondors-e-bike

There are threads on the forum about the conversions but you don’t get much of an improvement in performance with the 500 and you can buy the 750 from Aliexpress cheaper than you can buy the 500 here. 
 
My original,  is Now 750W with the 35Amp but with a 52V battery and it’s considered the best all out combination upgrade. It’s a true 33mph quick accelerating bike and because of the heavier Double Wall Wheels and heavier spokes and other additions it’s 30 pounds Heavier than your bike. Go Big or Go Home!

144E7DE9-532C-4B81-B396-7A11B3A1B1C4.thumb.jpeg.c04a803ecc7425760a6320430b15e1d0.jpeg

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                               REDDY

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I bought this today , just to see in the meantime if I can run the bike i Inherited properly

https://electrobikeworld.com/products/25amp-controller-with-higo-connectors

Can you show me the inn side of your bike on how the setup for the 52 V batter goes?

Also if you can please show me the link of the cheap bafang 750 that i can use with my case.

 

thank you!

 

does this one work with my bike? the battery is the original 26 plus the new controller i just bought

https://www.aliexpress.com/item/32816994546.html?spm=a2g0o.productlist.0.0.4833284fCKTfzJ&algo_pvid=834f5926-70b2-44d0-bc22-53a736a5502c&algo_expid=834f5926-70b2-44d0-bc22-53a736a5502c-6&btsid=0ab6d69f15946767924483866e0737&ws_ab_test=searchweb0_0,searchweb201602_,searchweb201603_

 

Are you in SOCAL?

Edited by Davide Busetti

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