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One of the ebike suppliers has a bike with a throttle but if you are cruising for a few seconds and let go of the throttle, it maintains that speed. The Golden Motors a few years ago had a cruise that would engage at the speed you were going, but it jumped to a higher speed most of the time...

There are a lot of issues that feed into lith recycling. Even 5 years ago, when the 'waste' was laptop cells and other smaller packs, you could sort of give it away or resell the higher quality cells. Now the price of new cells has dropped. A quality used cell can run $.50. So you could make a...

The safe chemistry is LiFePo4, or LFP. Ebike companies do not like the bulk. Companies like Tesla have come around to LFP, for safety and cost. I built a 32 cell LFP pack with 32650 cells from Sriko, Ebay. The LFP pack sits at around 52 volts and it drops to 50.5 volts with a 5 amp load after...

Have you really looked? Basically the 2,000 cycle battery is LFP. That chemistry is taking over the RV battery market. As always, there are high margin US companies and low margin Chinese companies. Lots of tests, thousands on YouTube, show the Chinese products are not consistent, but they are...

I've been playing with 6AH LFP, big fat cylindricals and fairly cheap. I was hoping to do something with 1s, and keep the size down. The problem is when you take 3Ah out, you have 3Ah left and a 3c rate for 3ah is around 9 amps. And it collapses from there. You see 30c lith cells, but often only...

I've noticed the shift to a new generation from Bafang. A lot of the information comes through Eunorau. Now there is website that is basically a joint enterprise with both Eunorau and Bafang. There are listings right now for 2 products. There is a kit that roughly corresponds to the BBS02 and...

I was a big fan of the MAC. Got one in 2015. It made quite a bit of noise. A year of silence with the BBS02 has made me think noise is for Chiefs home games. Eunorau has been listing the MAC as a motor they sell, but it's always on the wrong listing page. EM3ev lists some maintenance stuff for...

I guess I would not use it. To check a cell or group you'd have to cut it off, cut the nickel around it and then do a test. Not much fun. You'd need to spot weld the strip if it checked out or you replaced a cell. You could jump that cell group with a wire. Cut the group off and then run a wire...

It seems like you have 12/13th of a good pack. The only thing I can think of is to run the whole pack down and then charge that bad set and one good set, to compare capacity. The good sets are all the same so one set is as good as another. If there is a bad cells in a set of 3 it should be...

I'm sorry yours did not work. I wish there was a database of these Chinese packs, a profile of whether they might be any good. I would expect a kind of binary set of results, good or awful. It would be nice to know what went wrong. Weak cells across the boards? A few really bad cells? Bad chips...

A 4 Month Evaluation I expected this pack to fail or have a very short life, but that's just me looking at the low price and thinking it can't be real. There are reports of problems with cheap packs, but the pack worked for me. It is light. It fits in a cheap top tube bag. No problems ramping...

There is a lot of hard truth to be distilled from what you say. The Sanyo GA chart shows a very significant drop in capacity even over 100 cycles. (Google Sanyo GA datasheet.) This is a little confusing because you pay the big bucks for the GA and it is considered a premium cell. But after 100...

Actually, yes, they had balance leads in a connector like a hobby LIPO pack, but it was a totally different connector. When I took the pack apart I did not like the construction. There were thin strips of nickel and very small wires or minimal nickel strips to connect the 6 cell parallel...

The 6 were welded across, top and bottom, so 6 in parallel, then four in series. So 12 volts. Nope, no BMS. Not something I wanted, but it might have made a difference. They might have been junk. The cells are DLG energy, which is a real Chinese company. I probably will switch to new cells for...

Why Do Packs Fail? I bought 4 9ah LiFePo4 packs, rated at 12 volts. These packs were old and used. When I tested the 4 packs, they ranged from 6.4 amp hours to 7.7 amp hours. With different capacities, and 4 in series to make a 48 volt pack, you have to charge and discharge for the weak module...

https://eunorau-ebike.com/collections/hot-sale-kits

During the Sondors campaign (ES) mostly dissed the bike he was offering. It was pure fear mongering. Even Karl G, who is basically brilliant, had few kind words for Sondors. The Sondors bike was assembled and shipped and a lot of people were very happy. You sold me the absolute worst battery...

It's not simple. It's hard to say how well the Chinese vendors respect the international shipping rules. Hobby King used to throw LiPo cells into a box with no padding the the PO flew them down here. Not ideal, since LIPO is very volatile. I bought a $100 48/15 from Liito Kala. It took 3...

Bafang is serious, if you are doing Bafang stuff:

There are a lot of issues in this industry, and the DIY side is hardly thriving. No one can evaluate the basic and very low priced packs out of China. One guy is using Chinese cells, another Tesla, and so forth. I have a Luna battery, lightly used, and the BMS units go bad. They look like...