Search found 4181 matches

by cwah
Dec 01 2019 5:30pm
Forum: Items for Sale - Used
Topic: Custom bike stolen - UK
Replies: 15
Views: 855

Re: Custom bike stolen - UK

e-biker wrote:
Nov 30 2019 5:24pm
i hope you get it back my brother!i would love to catch a thief in action and give him a whoopin he deserves!
Police didn't give a shit... it's gone :(
by cwah
Nov 24 2019 6:16am
Forum: E-Bike General Discussion
Topic: Stackable power wall kit with 18650 on ebike
Replies: 6
Views: 555

Stackable power wall kit with 18650 on ebike

hello

Anyone used this for their ebike?
https://s.click.aliexpress.com/e/AvtwcITKj

I think it's possible to stack as many as needed but no idea on reliability on ebike with all vibration
by cwah
Nov 17 2019 11:47am
Forum: Battery Technology
Topic: Li-ion cells cycle ageing
Replies: 170
Views: 8096

Re: Li-ion cells cycle ageing

john61ct wrote:
Nov 17 2019 11:23am
Is resistance an important factor for anything other than C-rates?
Yes. It's correlated with battery sagging, aging cell as well as temperature
by cwah
Nov 17 2019 4:57am
Forum: Battery Technology
Topic: Li-ion cells cycle ageing
Replies: 170
Views: 8096

Re: Li-ion cells cycle ageing

I bought a batch of lg mh1. Any chance to chart that out?

Thanks
by cwah
Oct 14 2019 1:47am
Forum: Items for Sale - Used
Topic: Compact cargo bike - UK London
Replies: 2
Views: 439

Re: Compact cargo bike - UK London

Sold. Not interested sorry
by cwah
Sep 28 2019 4:14pm
Forum: E-Bike Non-hub Motor Drives
Topic: "W7" friction drive kit with rubber
Replies: 7
Views: 622

Re: "W7" friction drive kit with rubber

sandyhalo wrote:
Sep 28 2019 9:09am
If you are interested in friction drive, qiroll's QR-E is amazing.

What's so amazing about it? Does it work well in rain and slopes?
by cwah
Sep 27 2019 4:03pm
Forum: Items for Sale - Used
Topic: Compact cargo bike - UK London
Replies: 2
Views: 439

Compact cargo bike - UK London

Hello, After I got my bike stolen, I can't afford to buy again all the electric parts that were supposed to go to this project. So I'm unfortunately selling my un-electrified Juicy cargo bike. It's the un-electrified version of the longtail cargo bike from Juicy bike ODK V3 (https://www.juicedbikes....
by cwah
Sep 26 2019 11:05pm
Forum: Items for Sale - New
Topic: Kepler Bottom Bracket Friction Drive For Sale (Finally)
Replies: 360
Views: 52367

Re: Kepler Bottom Bracket Friction Drive For Sale (Finally)

I need something helping me on hills (torque needed) in a rainy environment (london uk).

Could the friction drive be a solution?
by cwah
Sep 23 2019 1:25pm
Forum: Battery Technology
Topic: New 14s battery pack, US18650VTC6 vs NCR18650GA
Replies: 190
Views: 8432

Re: New 14s battery pack, US18650VTC6 vs NCR18650GA

I just ordered MH1 cells from Nkon. Was it good?
by cwah
Sep 22 2019 7:40pm
Forum: Battery Technology
Topic: New 14s battery pack, US18650VTC6 vs NCR18650GA
Replies: 190
Views: 8432

Re: New 14s battery pack, US18650VTC6 vs NCR18650GA

"anything higher capacity will die off quicker" ..... that is only flippy ´s opinion, as he prefers 29E above all. Read again Pajda´s reports. He has biggest collection of really tested cells, bigger than anybody else here. sorry, but its not a opinion, its a measured fact. anyone that has done lif...
by cwah
Sep 22 2019 3:03pm
Forum: Battery Technology
Topic: New 14s battery pack, US18650VTC6 vs NCR18650GA
Replies: 190
Views: 8432

Re: New 14s battery pack, US18650VTC6 vs NCR18650GA

Jan-Erik-86 wrote:
Sep 22 2019 2:54pm
Hahaha, sounds like a great idea, I'll get right on it! :lol:

Nah, really, I should just say thank you all for all the great help with this, and I'm sure I'll be happy with my new PF pack. Just placed the order now. :)
Why not the mh1? I'm thinking to order these. Either mh1 or m36
by cwah
Sep 20 2019 3:03pm
Forum: Battery Technology
Topic: New 14s battery pack, US18650VTC6 vs NCR18650GA
Replies: 190
Views: 8432

Re: New 14s battery pack, US18650VTC6 vs NCR18650GA

So i'm falling more towards the PF or 29e then, understanding this is a better option then the GA in the long run as they are both cheaper and last longer, with the downside being less initial capacity and more voltage sag. When comparing these two cells, which would be the better one? They cost ex...
by cwah
Sep 20 2019 5:57am
Forum: Battery Technology
Topic: New 14s battery pack, US18650VTC6 vs NCR18650GA
Replies: 190
Views: 8432

Re: New 14s battery pack, US18650VTC6 vs NCR18650GA

flippy wrote:
Sep 20 2019 3:45am
anything with higher capacity will die faster.

note: the PF does have much better lifespan when the loads are reasonable. the 29E can just take more abuse in my tests.
if you have a sub 1C discharge and stop at 4.05V then the PF will outlast the 29E by far.

Why higher capacity dies faster?
by cwah
Sep 20 2019 2:07am
Forum: Battery Technology
Topic: New 14s battery pack, US18650VTC6 vs NCR18650GA
Replies: 190
Views: 8432

Re: New 14s battery pack, US18650VTC6 vs NCR18650GA

Thanks that's good to hear. When looking at the datasheet, it shows 70% lifecycle after 500 cycles: https://produktinfo.conrad.com/datenblaetter/1500000-1599999/001558879-da-01-en-LG_LIION_AKKU_INR18650MH1__3200MAH.pdf It's actually less than the NCR18650BD which has close to 80% after 500 cycles? ...
by cwah
Sep 19 2019 2:51pm
Forum: Battery Technology
Topic: New 14s battery pack, US18650VTC6 vs NCR18650GA
Replies: 190
Views: 8432

Re: New 14s battery pack, US18650VTC6 vs NCR18650GA

Anyway all of the BD,BE,BM line is outdated and there are much better choices for DIYers. What are the better ones which would make sense financially? If you insist on 3200 mAh capacity then it is LG MH1. This cell is used by many ebike producers and it has significantly better operational life tha...
by cwah
Sep 19 2019 2:39am
Forum: Battery Technology
Topic: New 14s battery pack, US18650VTC6 vs NCR18650GA
Replies: 190
Views: 8432

Re: New 14s battery pack, US18650VTC6 vs NCR18650GA

Isnt the BD basicly the Tesla cell ? Basically yes, I never tested BD to confirm it, but from info what i have the BD seems to be a twin of BE (BE is Tesla cell from original 85 battery) both with older NCA+C chemistry. The only difference is by my opinion that BE does have bottom vent and BD does ...
by cwah
Sep 18 2019 6:18pm
Forum: E-Bike Non-hub Motor Drives
Topic: Most reliable Mid drive motor kit?
Replies: 16
Views: 975

Re: Most reliable Mid drive motor kit?

stay under 1000w bbshd very reliable nyc cargo ebikes well over +10k miles stay under 500w bbs02 very reliable trouble is most users operate bbshd 1500w or 900-1000w bbs02 not gonna last @ those levels I used 2 BBS02 at manufacturer level (although I've set to the max power from the setting), and b...
by cwah
Sep 18 2019 6:16pm
Forum: Battery Technology
Topic: Battery kit - Does it need spot welding?
Replies: 5
Views: 221

Re: Battery kit - Does it need spot welding?

It does require spot welding. Those are just holders and not modules with contacts. If you look at the nick strip, you can see little groove which would force contact with the cell: https://ae01.alicdn.com/kf/HTB1fVvJc3aH3KVjSZFjq6AFWpXad.jpg https://ae01.alicdn.com/kf/HTB1PHvQc8Cw3KVjSZFlq6AJkFXaR...
by cwah
Sep 18 2019 6:12pm
Forum: Battery Technology
Topic: New 14s battery pack, US18650VTC6 vs NCR18650GA
Replies: 190
Views: 8432

Re: New 14s battery pack, US18650VTC6 vs NCR18650GA

I'm actually thinking to buy the NCR18650BD:
https://evwest.com/support/panasonic-nc ... asheet.pdf

The discharge curve after 500 cycle looks quite good from 3100mah to 2550mah? So still 80% capacity?
by cwah
Sep 18 2019 5:42pm
Forum: Battery Technology
Topic: New 14s battery pack, US18650VTC6 vs NCR18650GA
Replies: 190
Views: 8432

Re: New 14s battery pack, US18650VTC6 vs NCR18650GA

Hello, I've done some research on the best chemistry to use, and decided to stick to NCR chemistry. It appears it is the one that is ranked safest and best lifecycle: https://batterybro.com/blogs/18650-wholesale-battery-reviews/18880255-battery-chemistry-finally-explained We can also see that in the...
by cwah
Sep 18 2019 5:38pm
Forum: Battery Technology
Topic: Battery kit - Does it need spot welding?
Replies: 5
Views: 221

Battery kit - Does it need spot welding?

Hello, I'm not clear about this product: https://www.aliexpress.com/item/32838272069.html It looks like a kit I could assemble just with some screws. But the description says welding. I'm not sure if it's the english that is wrong, or if it needs to do spot welding on top of that? From what I see it...
by cwah
Sep 17 2019 12:28pm
Forum: E-Bike Non-hub Motor Drives
Topic: Most reliable Mid drive motor kit?
Replies: 16
Views: 975

Re: Most reliable Mid drive motor kit?

Thanks guys. So no mid drive for me...
by cwah
Sep 16 2019 4:46pm
Forum: E-Bike Non-hub Motor Drives
Topic: Most reliable Mid drive motor kit?
Replies: 16
Views: 975

Most reliable Mid drive motor kit?

Hello, I had very bad experience buying few years ago 2 BBS02 kit. They both failed. They can't handle high mileage. They need to be greased as well. I just can't be bothered to do any maintenance and decided to change to Direct drive. But I wonder if progress have been made? Ideally I'd like a kit ...