My Bafang Ultra Mountain Bike! Frey AM1000

DaninSpain said:
After nearly 4 years I'm now really starting to notice the decline of my battery and need to start looking at replacing it. I'm just waiting for a quote from Frey for a replacement, but I thought I would ask if anyone else has replaced their battery, and if so did you get a Frey replacement or a 3rd party battery. If you went 3rd party, would love to know about your experience. How do you know which size/shape battery to choose, how much was it delivered, and how does it compare to Frey's own battery.
Ta v much
Dan

Danin has asked a very good question.

Has anyone tried to replace the battery pack of a FREY AM1000 with a ready made third party provider?

I would be even more interested to know about models produced after 2020, as they seem to have switched battery pack provider at some point...
 
I have some battery related questions:

I have the Fat1000 with 21Ah 48V battery. Does anyone know is there empty battery slots inside the casing, so it could be possible to up the Ah from 21+ by adding more batteries? Or to convert it to 52V and get to keep it at 21Ah, so I wouldn't lose Ah in conversion?

I am also interested in changing the battery bms to bigger. Isn't the original rated 30A continuous and 40A max amperage? I am not going to do it by myself, but I am interested if it can it be changed in an easy way? If I remove the battery casing part that has the battery indicator, is it right there or somewhere deeper and more difficult to access?

----

Ok, I will answer myself as I figured things out. There aren't empty slots in 21Ah casing - at least not enough to be able to put more Ah in that battery. And original BMS is 30A. but not so sure about that max amperage, or how it is defined.
 
Hi FastBiker,

There is some space, a whopping 2 cells xD. The casing is a Reention Dorado Max, 505mm, that can hold 80 cells maximum.

I have two variants; a 52V = 14s/5p = 70 cells 17.5Ah (910Wh) and the original 48V = 13s/6p = 78 cells 21Ah (1008Wh).

I have seen 52v 20Ah (1040Wh) versions on Aliexpress supposedly those would fit but disputable/unverified quality.

Cheers,
H
 
Ok, thanks for the confirmation.

Yes, it is sometimes a gamble when ordering things from Aliexpress, especially electronics like batteries. But there is one Dorado 21700 battery maker that I have read some good comments, and for a moment I was thinking about ordering. Eventually contacted my local battery maker and ordered 48V 25Ah Dorado 21700 with 40A bms. More expensive than Chinese ones but at least I know the quality is superb. ..and after a round of queries, Chinese ones come with 30A bms and at least places I asked, it wasn't possible to upgrade to bigger.

Btw, on previous page there was a message about whether 21700 will fit into Frey bike. I have two Fat1000, one with XL and one with L frame, and I am sure 21700 will fit on XL frame. L will be tight but I am confident it will fit also. I think that Fat1000/AM1000 V5 with M frame it propably will not fit. But in a month or two I know for sure

Here is pics of Frey Fat1000 L and XL frames with 48V 21Ah battery. Smaller gap in L frame (lower) is about 7-8mm, and as Dorado Max is only 5mm higher, it should fit. (There has been Am1000 V5 / Fat1000 made with at least with two different frames. Mine is the one that has "triangle" shaped gap in front of saddle.)
 

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shaddix

1 µW
Hi folks! :D I ordered one of these from Hanover Bikes, apparently Frey's only US distributor? Never had an ebike before, never had a MTB before :D

I live in the boonies and in order to get to some good riding spots from my house require me to ride ~0.5-1.5mi on 35-40mph streets with no shoulder. AM1000 seemed to be the ticket for this so I can haul arse through those few sections of road.

I'm going to read the whole thread and then maybe come back with questions for the braintrust :D
 
My chainstay weld cracked on a circa 2017 Frey AM.

Is there any warranty left for frame or help from Frey to be excpted? I heard they have a good policy of honoring broken frames.

Alternatively, how to fix the frame? It is the weld near on the chainstay close to the crankset.
 
My chainstay weld cracked on a circa 2017 Frey AM.

Is there any warranty left for frame or help from Frey to be excpted? I heard they have a good policy of honoring broken frames.

Alternatively, how to fix the frame? It is the weld near on the chainstay close to the crankset.
Is 300 USD an OK price for a replacement V5 Frey AM frame including shipping to a nearby Asian country?

I would rather get it for free and pay for only shipping like others here who have had similar failures, shipping to Asia won't probably more than 100 USD, so the frame is costing over 200 USD.

New sticker price for a frame is 700 USD. So I guess 300 USD is better than nothing.
 
A 5yr old frame being replaced for you with 500 usd discount is rather generous as you are not within your warranty timeframe. I was within warranty and had to pay for my shipping. Note that given your timing it seems they even offered this solution to you quickly so that's a plus :)

And yes, it is possible to weld the frame as I did that and have used it extensively afterward. Keep in mind that welding Al ain't the easiest so get a profi fix.
 
A 5yr old frame being replaced for you with 500 usd discount is rather generous as you are not within your warranty timeframe. I was within warranty and had to pay for my shipping. Note that given your timing it seems they even offered this solution to you quickly so that's a plus :)

And yes, it is possible to weld the frame as I did that and have used it extensively afterward. Keep in mind that welding Al ain't the easiest so get a profi fix.
Thanks.
Did you document here how the weld fix was done?

Interested in details.

In the country I live labour is quite cheap so considering this option as well.
 
Thanks.
Did you document here how the weld fix was done?

Interested in details.

In the country I live labour is quite cheap so considering this option as well.
Not much to document, here are some photos. And yes, I broke it on two spots that time. They've made improvements to the frame since 2018 I believe, so I haven't actually seen any of those have this issue. My newer frames also never broke but I heavily used them.

Cheers, hope you get it working again!
 

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Just to write about all the things that broke, here's another part:

Keep in mind that my riding style was intentionally trying to break the bike ;)
 

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