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I think Paul at EM3ev discusses the shells. He thinks the common ones are rubbish. That was my experience, that they weren't well made. But you are correct that ebike makers are 'stuck' with certain shell configurations. So then you try to fit the bigger cell in the space. What impressed me...

I noticed that UPP, or Unit Pack Power, a Chinese ebike battery pack maker, now lists the Tesla 21700 in their high capacity packs. (See Amazon snip). I don’t know how many pack manufacturers have moved to the 21700. I have to figure that Tesla cells would be highly regarded in the US. I’m not...

I remember the 'good old days' when ebikes went 28 mph. But 5 years ago a battery was $1000 a kwh, and now it is 1/5 that. So 28mph was kind of worthless for 20 minutes of riding. Today, real world, you have 2 kwh packs and they are getting cheaper. Actually, the changing tech is pushing some...

Right now, Bafang has a cable to address programming of the controller. I'll guess your bin file could be uploaded with that cable, but I run stock and don't have the cable. I got my 02 from BafangUSA and all the little plugs went in all the little sockets. I know what a YouTube site, High...

Lishen 21700 Cells I noticed that JAG35 (Jehu Garcia) is now selling Lishen 21700 cells. I wrote a summary of Chinese 21700 cells when I talked about the Liito Kala 15AH and 48v pack build around 21700 cells. The LK is the hundred dollar pack that is still around. The 217 is a very nice ebike...

There was some stuff on YouTube about how the 02 and HD will be rebranded and get some mods. Two things people have mentioned are a lock on the controller, and handshaking to the battery to limit 3rd party packs. Eunorau has rebranded motors, but for now 315 and 615, not the 325 and 625 of the...

https://www.huffpost.com/entry/greg-knapp-dead_n_60fa87dee4b0ca689fa8381f https://nextcity.org/features/view/how-much-is-a-cyclists-life-worth-anyway I’ve had two very scary incidents where a driver crossed the centerline and was heading right for me. Both times the driver seemed to look up at...

There was something this morning about LG and Samsung moving along on this cell. It looks like 2023 for the Tesla builds, so that is not close. For Lifepo4, the 32650 is a fairly standard cell. I think Battleborn may use that size. They say the 4680 is 5x more energy (non LFP), so if they mean...

Final Thoughts I have 50 cycles on the battery. The discharge curve is not changing. I run it down 250 wh or so and the voltage ends up in the same spot, under load or recovery. The problem with a decent battery pack is that you don't think about it very much. I cut open part of the wrap to see...

You Tube Creates Clarity and Chaos Last September, I bought a Chinese spot welder for $25. I went through Amazon thinking there is more protection if something went wrong. The welder took 3 weeks to show up and burned up in the first five minutes. I filed a claim, or whatever, with Amazon. The...

I’ve been using this battery pack on my BBS ebike, a DIY conversion, for 35 days. I haven’t encountered any issues. I’ve run it down to 40% remaining, and the voltage sags but it’s not terrible. The capacity works for me. At some point the sags at high draw trip the BMS, even if the battery is...

I don’t know what to say about BMS boards. The old saying is “That’s another thing to break”. A lot of recycled stuff includes the note that the BMS is not usable. I’ve used packs with no BMS. In general, the basic nature of electricity balances out a pack. When they do go out of balance, it...

Everyone seems to understand that batteries are the future. The main thing that drives battery power is cost. People are buying some electric cars, BEV’s, but they are buying a lot of ebikes. I don’t know how much people know about battery power as it pertains to an ebike. There are grades of...

Sure. So far, so good. Ten cycles. Discharge voltage has held steady. I'll test capacity at maybe 30-40 cycles. Good luck with what you ordered. Not much information out there.

Is This Battery for Real?? shorturl.at/suIOQ I ordered this battery the end of March. It arrived last week, around May 13th. The package simply showed up with a DHL label on it. There was never any tracking. The cost was about what the ad states, plus sales tax. I guess Ali is enough of a...

I don’t know why anyone believes any of the ebike numbers. The problem is that there are a lot of variables. Rather than sorting this stuff out, the marketing tends to dwell on certain ‘magic’ numbers. Reviews seem to make things worse. Range and top speed are very popular numbers. Both are...

Well, who cares... Everyone has a (hidden) agenda. The whole ebike structure, the regulatory structure, is suspect, and it’s becoming counter productive, at best. I used to ride my ebike, back in 2014. I liked riding on the bike paths, which are multi-purpose. There are a lot kids. It’s not...

That last statement could be taken as very ironic and very funny. I mean, there are people, companies, who have to follow the letter of the law. Battery Hookup, a DIY company, suggested there would be a hazmat fee on certain watt hour shipments. But they seem to have backed off. I bought a 750...

They are gone. I have one on order. (@harryS) BH sent out an email 3 hours ago and that must have cleared the deck. All used stuff is a gamble but this was a little better pedigree than those hoverboards. I bought 4 of those and used them all the time. But now I have a 48v BBS. I was trying...