Dado
Active member
Guys, anybody has any firmware for M820? Would like to add also support into my flashing device. Thanks
Bafang m820
- Thread starter Vsoria
- Start date
Ahah, thanks for checking! My weak ass magnet was probably confused by the plastic coating
We can easily save 100gr by replacing it with that kind of spider I guess: https://www.bike24.fr/produits/417588
Edit: or just use this and save almost 200gr
Last edited:
That spider looks reasonably priced. Are you sure, that Bosch gen4 cainrings will fit?We can easily save 100gr by replacing it with that kind of spider I guess: https://www.bike24.fr/produits/417588
Edit: or just use this and save almost 200gr
I will probably use the stock one, and change only if I will need different gear range.
I rode a Bosch this weekend and I'd say it's the same offset, but I did not measure anything, only a feeling
I don't think the Bafang spline is compatible.
Not sure if the M820 is compatible with 500, 600 series either.
Not sure if the M820 is compatible with 500, 600 series either.
Dado
Active member
Bosh spline is not compatible with bafang.
temon10
Well-known member
yes it's correct. the longer one place near the battery.
The spider is compatible with the M510 and M600. They have slight differences, but they fit.they work. I have three motors M820, M510 and M600.
Thanks @LAnton I don't want a direct mount chainring. So I hope mine are 104bcd.
Anna Shen from fieldbikes just said to me, that bafang still need more than a month...
We also don't have the frame yet, so yeah...
Frame should be ready verrrrry soon apparentlyAnna Shen from fieldbikes just said to me, that bafang still need more than a month...
We also don't have the frame yet, so yeah...
More than a month is bad
I have my aliexpress shopping list ready for a 21700 12S1P ultra lightweight pack, I think I'll go for it!
I'm just struggling for the charger and was wondering if this one would fit ?Frame should be ready verrrrry soon apparently
More than a month is bad
I have my aliexpress shopping list ready for a 21700 12S1P ultra lightweight pack, I think I'll go for it!
https://fr.aliexpress.com/item/1005....0.0.5982378ddHv3lG&mp=1&gatewayAdapt=glo2fra
it's a 42V 5amp, what do you think ?
Unfortunatly, 42V charger won't work. 42V is the max charging voltage of 10s packs, aka 36V nominal packs. You need 12s charger, that will charge up to 50.4V.
For original F014 43V 12s battery, bafang decided to cut charging at 4.1V per cell, so it goes to 49.2, to preserve battery life.
42V is for sure too low, you would be effectively using botton 30-40% of the battery capacity.
Be careful though with the battery pack selection. I wouldn't buy one that doesn't has BMS included, if you are not ready to retrofit one yourself. Also, I would not want to buy prebuilt packs from aliexpress. I have heard, that there are a lot of low quality fake cells/packs there. If I would decide to go DIY, I would buy pack from reputable seller or buy indivudial quality cells (original LG or samsung) from reputable seller and have someone who know what he is doing build it for me, with the quality BMS, ofcourse.
Myself, I will just wait for the official battery.
For original F014 43V 12s battery, bafang decided to cut charging at 4.1V per cell, so it goes to 49.2, to preserve battery life.
42V is for sure too low, you would be effectively using botton 30-40% of the battery capacity.
Be careful though with the battery pack selection. I wouldn't buy one that doesn't has BMS included, if you are not ready to retrofit one yourself. Also, I would not want to buy prebuilt packs from aliexpress. I have heard, that there are a lot of low quality fake cells/packs there. If I would decide to go DIY, I would buy pack from reputable seller or buy indivudial quality cells (original LG or samsung) from reputable seller and have someone who know what he is doing build it for me, with the quality BMS, ofcourse.
Myself, I will just wait for the official battery.
I've found 21700 cells which seems good quality (not on Aliexpress - from an EU store) - LG 4930mAh - 14.4 discharge current - and a 12S BMS on Aliexpress which has good reviews.
I'm still not trusting myself to put this into the frame, if I go with this temporary pack, I'll put this in an external case strapped to the frame.
If my maths are good, 14.4 Amps * 43v = 619 W , if I stay at 50/75% of the assistance, I should be good and not explode the battery
temon10
Well-known member
Someone have this version of DP C245 and can connect to Bafang Go+ app
still waiting for your frame ? Unfortunately I have too many to do I don't have time to build a DIY battery, I will probably contact someone who does it and pay the extra bucks to get a 12S1P while waiting for the official
Dado
Active member
bad news from Anna Shen : Bafang told them the BTF014 won't be ready before at least 1.5 month ...
that's crazy, no alternative in 43v
I honestly don"t know what to do.
Anyone interested in a 43V M820 so I can buy a brand new 36V ? xD
Mate and what is BTF014?
Anyway I have noticed something with 43V also. Not possible to flash 43V into M510.
They still puting some roadblocks.
Time to experiment with flashing also bootloader...
this is the bafang 43V battery compatible with the m820.Mate and what is BTF014?
Anyway I have noticed something with 43V also. Not possible to flash 43V into M510.
They still puting some roadblocks.
Time to experiment with flashing also bootloader...
If you can flash the m820 from 43v to 36v, I would be really happy
but I think these are 2 different hardwaresYes, still waiting. Today I was told, that it should be ready by the end of this month. But I did order custom painting, that will take additional 2-4 weeks..
You already have yours?
No, still waiting, Jim told me it was supposed to be shipped last week but they were late. Still waiting for news…
I didn’t want custom paint because it was so long! But I won’t have a battery anyway
Dado
Active member
this is the bafang 43V battery compatible with the m820.
If you can flash the m820 from 43v to 36v, I would be really happy
Not hw, but bootloader is different, which refusing 36 or 48V. Crazy, bafang is making it complicated to themself. Dont understand why they even come up with 43V.
temon10
Well-known member
make custom DIY 43v battery. find local expert.bad news from Anna Shen : Bafang told them the BTF014 won't be ready before at least 1.5 month ...
that's crazy, no alternative in 43v
I honestly don"t know what to do.
Anyone interested in a 43V M820 so I can buy a brand new 36V ? xD
yep. totally agree. and don't trust Bafang timeline for anything. they are always delayed
temon10
Well-known member
Totally agree, Bafang timeline untrusted.
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