Help Wanted: Prototyping a cheap ebike for the people

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whatwat
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Re: Help Wanted: Prototyping a cheap ebike for the people

Post by whatwat »

Ravensnest wrote: Tue Jun 30, 2020 12:46 pm Graphene batteries will change the whole e-bike industry and everything else that runs a battery. I can't wait for them to be at a reasonable price point and better availability. But that will take a while.
Graphene anything is a long way off.
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Re: Help Wanted: Prototyping a cheap ebike for the people

Post by beaker »

offroadscholar wrote: Tue Jun 30, 2020 2:52 pm
beaker wrote: Tue Jun 30, 2020 12:23 pm
whatwat wrote: Tue Jun 30, 2020 11:51 am
beaker wrote: Tue Jun 30, 2020 11:11 am
whatwat wrote: Tue Jun 30, 2020 9:32 am Regarding the Voltra motors; apart from the fact they are not designed by a French dude and made here (Chinese) they are pretty good and have big (16”) wheels which is great for comfort.
They’ve now got lots in stock at their showroom in PP.
Why would anyone want a 16" wheel ?
The biggest problem to overcome when selecting an ebike parts provider is getting a company that can and will ship the battery to Cambodia.
Beware many sell you a battery and kit only later to inform you that they can't ship the battery to Cambodia this has happened to me with several sellers.
There is only one company I have found they sell ebike kit and batteries my first batter had to be shipped to Vietnam then brought into the country by a very small courier company. The latest battery I got from them was sent by FedEX and the shipping was free.
There are also ebike parts suppliers in Thailand these days so when things open up again for travel one could go there to get a bike or parts and actually set eyes on the product you are buying. Thou flying back with a battery may be problematic some have said that putting them in carry on luggage was acceptable but not in luggage going into the planes hold. Returning by bus/taxi would be my choice to bring back the goods/ebike.
Sorry, they are 18”.
Compared to most electric scooters that’s a big wheel.

But as we are taking about E-bikes it’s a mute point. I looked on AliExpress and yes no batteries.
Aren’t they just the same as normal batteries just packaged up in a container?
They are usually li-ion 18650 cell that are just as problematic to have imported in sufficient quantities for an ebike and usually hard to source and expensive $5+ each. Companies who make lots of ebike batteries get them for less by buying 1000s at once. A person would also need a spot welder, pure nickel strips, battery case, BMS and the experience to make.
My battery is 52v17.5Ah so takes 98 Samsung batteries @ $5 each so it would be $490 plus the shipping which is expensive because it is considered hazardous material so it was cheaper just to by completed battery with warranty for $600
Did you have to pay import tax on the battery ?
I suspect in this time of Covid19 the GoC will be looking to maximum revenue where they can.
No addition fees for the battery for my bike 52v17.5Ah and I also bought a ebike kit for my wife's bike at the same time she got my old 48v11Ah battery. The shipping was free and there were no additional fee for any of it all bought during the virus at the end of April.
Last edited by beaker on Tue Jun 30, 2020 4:02 pm, edited 1 time in total.
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Re: Help Wanted: Prototyping a cheap ebike for the people

Post by beaker »

whatwat wrote: Tue Jun 30, 2020 3:16 pm
Ravensnest wrote: Tue Jun 30, 2020 12:46 pm Graphene batteries will change the whole e-bike industry and everything else that runs a battery. I can't wait for them to be at a reasonable price point and better availability. But that will take a while.
Graphene anything is a long way off.
You must be a very young man indeed if you can wait for new technology like graphene batteries. Then there will be sodium-ion batteries, silica-based cathode for lithium-sulfur batteries, and batteries made of hollow nano-materials too but I can't hold my breath that long too old for that I want to ride now.
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Re: Help Wanted: Prototyping a cheap ebike for the people

Post by offroadscholar »

offroadscholar wrote: Tue Jun 30, 2020 2:52 pm
Did you have to pay import tax on the battery ?
I suspect in this time of Covid19 the GoC will be looking to maximum revenue where they can.
No addition fees for the battery for my bike 52v17.5Ah and I also bought a ebike kit for my wife's bike at the same time she got my old 48v11Ah battery. The shipping was free and there were no additional fee for any of it all bought during the virus at the end of April.
[/quote]

Good to hear.

On a side note, I'm looking at khmer24 and https://www.facebook.com/groups/2621016 ... __tn__=C-R for a donor Mtb.
There's seems to be a lot of Khmer privateers (ie not established bike shops) importing bikes . Wondering what the scam is.
Backdoor sales from the big bicycle factories near the Viet border ?
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Re: Help Wanted: Prototyping a cheap ebike for the people

Post by beaker »

offroadscholar wrote: Tue Jun 30, 2020 4:55 pm
offroadscholar wrote: Tue Jun 30, 2020 2:52 pm
Did you have to pay import tax on the battery ?
I suspect in this time of Covid19 the GoC will be looking to maximum revenue where they can.
No addition fees for the battery for my bike 52v17.5Ah and I also bought a ebike kit for my wife's bike at the same time she got my old 48v11Ah battery. The shipping was free and there were no additional fee for any of it all bought during the virus at the end of April.
Good to hear.

On a side note, I'm looking at khmer24 and https://www.facebook.com/groups/2621016 ... __tn__=C-R for a donor Mtb.
There's seems to be a lot of Khmer privateers (ie not established bike shops) importing bikes . Wondering what the scam is.
Backdoor sales from the big bicycle factories near the Viet border ?
[/quote]

Some great used mountain bikes, I think they come from Japan, at great prices on Facebook.
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Re: Help Wanted: Prototyping a cheap ebike for the people

Post by Ravensnest »

whatwat wrote: Tue Jun 30, 2020 3:16 pm
Graphene anything is a long way off.
seems your knowledge is outdated or you barely googled it.
Still here, in country...
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Re: Help Wanted: Prototyping a cheap ebike for the people

Post by Phnom Poon »

graphene
it's coming to real-world applications 'real soon now'
aka much much longer than touted

.

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Re: Help Wanted: Prototyping a cheap ebike for the people

Post by beaker »

Phnom Poon wrote: Tue Jun 30, 2020 11:26 pm
graphene
it's coming to real-world applications 'real soon now'
aka much much longer than touted
Yes, like the flying car and solar panels from a printer
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Re: Help Wanted: Prototyping a cheap ebike for the people

Post by beaker »

beaker wrote: Tue Jun 30, 2020 5:03 pm
offroadscholar wrote: Tue Jun 30, 2020 4:55 pm
offroadscholar wrote: Tue Jun 30, 2020 2:52 pm
Did you have to pay import tax on the battery ?
I suspect in this time of Covid19 the GoC will be looking to maximum revenue where they can.
No addition fees for the battery for my bike 52v17.5Ah and I also bought a ebike kit for my wife's bike at the same time she got my old 48v11Ah battery. The shipping was free and there were no additional fee for any of it all bought during the virus at the end of April.
Good to hear.

On a side note, I'm looking at khmer24 and https://www.facebook.com/groups/2621016 ... __tn__=C-R for a donor Mtb.
There's seems to be a lot of Khmer privateers (ie not established bike shops) importing bikes . Wondering what the scam is.
Backdoor sales from the big bicycle factories near the Viet border ?
Some great used mountain bikes, I think they come from Japan, at great prices on Facebook.
[/quote]


I ran across these seems to be lots of used bike shops in this area near Lucky Lucky Moto
Image
Image
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whatwat
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Re: Help Wanted: Prototyping a cheap ebike for the people

Post by whatwat »

Ravensnest wrote: Tue Jun 30, 2020 10:42 pm
whatwat wrote: Tue Jun 30, 2020 3:16 pm
Graphene anything is a long way off.
seems your knowledge is outdated or you barely googled it.
Didn’t google anything. I’m a scientist.
Don’t listen to Chinese whispers.
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