Recent content by Little-Acorn

Well, well. Sixteen cells, and ever one of them (with no load, after a theoretically full charge) is in the range 3.3V to 3.6V... except the top one, connected directly to the thick red wire, which measured 0.2V. So maybe the BMS isn't fried after all. Maybe it's doing its job, preventing ANY...

Not completely familiar, but I have the general idea. Didn't have my camera handy, nor the time, sorry. They look shiny and new, just like all the others, no visible signs of abuse, overheating, desoldering etc. As I said, they weren't hot, just barely warm enough to feel while the others were...

Hmm, that's unimpressive. But I guess it works, mostly. Drawing major currrent thru the thick red cable could conceivably reduce the voltage it shows, if it's got any DC resistance. It shouldn't have, but... :-\ 59.6V is what I recall that showed. Then when the battery was fully charged (or...

Hi dnmun, thanks for replying. No markings on the BMS or speed controller, totally generic except for the Vpower sticker on the BMS. Bike names only to distinguish between the running and non-running one. When the charger is connected and charging, the hubmotor runs (I lifted the front wheel...

A few years ago I put together two ebikes, each with 48V 20AH LiFePO4 batteries, from Chinese kits. The Trek 7500 had a rear 48V 1000W hubmotor, tops out at 29MPH with big fat me on it, I'm happy. The Schwinn Cimarron had a front 48V 1000W hubmotor from a different manufacturer, tops out at...

These look like the ones! Thank you, Rin, Bob, and Jateureka!

Thanks Bob, I tried your suggestion. The search returned 0 results. Tried it with a zero before the 8, and with a letter O before the 8, no connectors. Tried it with three L's and with two L's, still no connectors of any kind, tho I found some interesting coin collections. Can you check...

Does anyone knnow where to get the connectors that are commonly found on the ribbon cables for e-bike batteries and chargers? Not the heavier 14ga or 12ga wires that carry the main drive current from the batteries. I'm talking about the ribbon cables that are used for cell balancing by the...

The cheapest way to get speed Two words: GASOLINE ENGINE.

Yep, guess I didn't use the names right. But my point stands. I wish the media would correctly identify the kind of battery that went bang. Was it a Lithium Polymer, or LiFePO4, or....?? It would also be nice if they pointed out that certain battery chemistries have more instability than...

There was an explosion in a FedEx office this morning (Wednesday, April 14) here in San Diego, maybe four miles from where I live. Apparently a box with some kind of lithium batteries in it, went bang. No one was hurt. First I heard of it was an announcement on the local station (KOGO 600 AM)...

This isn't the Trek, but is another 48V 1000W ebike I've put together. Performance is the same, and it actually rides smoother than the Trek. I'll probably sell it. .

California law defines two kinds of motorized bikes: Those with a top speed of 20mph, and those with a top speed of 30mph. The 20mph ones don't have many rules. You have to be 16 or older, and you have to wear a helmet when you ride. That's it. The 30mph ones (like mine) have more rules. You...

Whizzed all the way here nicely, except for the rear rack pack falling off due to my clumsiness at bungeeing it on. 48V, 1000W rear hubmotor, 20Ah two-piece LiFePO4 battery, top speed 30mph on level ground. Registered with Calif DMV, and even has its own cute little moped plate! At one point...

This sounds like they are saying, they found lots of bike-friendly cities in California, but didn't like how lopsided that made the map look. So they took some cities in other states that weren't so bike-friendly, and called them "friendly" anyway, and put them on the map. And they took some...