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Everything posted by WI_Hedgehog

  1. @ShanesPlanetI said way back when Kingsong subbed out their Fox shock for a knockoff that the suspension is going to be weak. There's no way a tiny mono shock can take a beating like that one does without being a quality part. And you bought one anyway. Who'd have thought InMotion was going to have bearing issues though? Runs counter to the company name...
  2. Quickly cancel your order! When you feel better you'll realize how unclear that line of thinking was!!!!
  3. I'm wrong, the Chargery reportedly uses 4.20V as do other EUC chargers. Simple, cheap, light, and fairly safe. Fast--no, but "faster." From the information I've seen I would guess the Veteran BMS does seem to stop the charge cycle to check the battery state and if the battery test comes back "sane" the BMS continues charging the battery, which works fine with a standard power supply that doesn't care about the lack of current draw and continues supplying power as needed. The Chargery, from the manufacturer's site, seems to be a smart charger in the respect that when the charger dete
  4. Thank you @mrelwoodand @Chriull, I stand corrected and learned more about EUC charging. Note the voltage while charging should be measured during the constant-voltage phase, otherwise (depending on the charger) the standby voltage can be a bit misleading, at least on the chargers I've used, depending on how smart the charger is and how well the output is filtered. There's room for advancements in EUC charging...obviously the current flow is going to dictate the charge rate while V is less than Vmax, so a faster charge during the Constant Current phase is dependent on the maximum cur
  5. That's one of my concerns with the Veteran Sherman, the quality of it and many other wheels isn't steller from the end of 2020 forward, while the speed we're asking for is. 44 vs 27 is a 60% speed increase and a bunch more Kenetic Energy given velocity is squared. KE = ((m)(v^2)) /2
  6. The V in fast chargers tends to be higher. Safe maximum (and minimum) voltage on a lithium-based cell depends on that particular cell's chemistry, but typically it's 4.35V. The lifespan at 4.35V is only about 20 charges, sometimes 10, again depending on chemistry. The lifespan of the same cell at 4.20V tends to be 500 charges, and at 4.1V around 1,000 charges--but that's highly dependent on chemistry and manufacturing process. Most "decent" cells will last 1,000 charges at 4.0V maximum. That's resting voltage though. Cells have something called "surface charge" where a small percent
  7. We've all seen it, what you're told before the sale doesn't quite match the product you own after the sale. Maybe the Engineers stretch the truth a little in their reports to Management, and Management does some creative rounding for the presentation to the Board, and the Marketing department lives on a whole different planet. When does it become a lie? I deal with "cheap shit from China" on a daily basis, and they've made exaggeration an art form. Look at the range estimates for EUCs and you know what I mean. People have guessed the Chinese find the lightest person around, have them putt
  8. Some high-end lithium BMS units I've encountered stop the charge cycle to check the battery state and if the battery test comes back "sane" the BMS continues charging the battery. Since a power supply doesn't care about the lack of current draw it continues supplying power as needed. A smart charger is a bit different: when the charger detects output current has fallen below a certain setting it stops the charge to prevent trickle charging the battery, which is harmful to lithium packs. The Chargery has this feature, so a "sanity check" by the BMS will cause the Chargery to stop charging
  9. I agree with @mrelwood on why: From experience, new cells no longer go through multiple charge/discharge cycles at the factory so they can be matched with similar cells, the practical reason being the cell assembly line is moving so fast (due to market competition) the paste thickness/uniformity isn't very uniform, so matched cells will go out of balance with use anyway. Paste thickness tolerance is incredibly tight, cell manufacturing machines wear quickly, and constantly upgrading bearings and the down-time associated with doing so is costly, so it's not done as long as the cells are
  10. Though the V8F is half the price, in stock, and just over 1/2 the weight of the V11... ...plus they're really reliable and owners love them... (and they're available on the Private Sales (secondhand) forum for even less...)
  11. Your reasoning is correct and cells will be fine with that. You're not over-heating the cells nor over-straining the balancing circuitry during fast charging, you're using the normal speed charger during the balancing phase, and you're not running the packs down enough to hit minimum voltage on any of the [newer] cells. As the cells age this might become an issue, but for now you should be fine. Do note with fast-charging the first 80% (constant current phase) goes faster than normal, but the last 20% of the charge (constant voltage phase) and balancing goes slower. (Time is saved over-al
  12. If you gear up with the mentality you're going to unexpectedly go down at 50MPH, pile up into a curb, then get hit by a land torpedo, you'll save a lot on hospital bills. We tend to plan optimistically, and eventually the unforseen happens... I'm not a safety snob (rather far from it). Spending time here with members who shared their unfortunate incidents (many at slow speeds) clued me in to what I don't know. Quality gear is way cheaper than bodily repairs.
  13. Reminder: It's not just what the cells can take, it's also the heat the balancing circuitry can/can't dissipate.
  14. That's unfortunately a strong possibility. While their renound lack of quality kept me from buying one they did drive the market to make faster wheels. I learned a lot from Gotway by them setting examples of "what not to do." The Monster was going to be that "hold your nose and do it" purchase...
  15. @mrelwood said (a bunch of stuff) If you show me a cell that in real-world conditions lasts 500 x20 = 10,000 full charge cycles (or "tens of thousands of cycles" -@alcatraz) I'll wet your flowers for a week. The chemistry doesn't exist for consumer cells to charge 3000mAh into a 3000mAh cell 10,000 or more times. Tesla automotive cells have the most advanced consumer chemistry known, and they hope they'll last 6,000 charges. The "million-mile battery" is a long way from the current 60,000 to 80,000 mile life expectancy, and like most of Musk's claims that's probably "highly optimisti
  16. Gotway had a lot of issues, and I'd bet not respecting their customers resulted in not respecting their employees, who eventually left. I wanted a Monster, issues delayed my purchase, and the result of reports is I won't be buying any Be-Goaty / Gotway products.
  17. I like Wikipedia, though unfortunately can't always trust a crowd-sourced information site (it depends on who's in the crowd and their motivations). Here's the info. from CE-Check.eu Gotway probably didn't put on the CCC symbol because the Chinese government would take serious issue if Gotway didn't meet the Chinese standards. (other countries' standards are their own concern, not china's)
  18. I seriously dislike "how much does it cost" questions when people don't even try to understand what you're driving (car, motorcycle, EUC, custom "something," etc...), since there's no right answer. For EUCs I say, "They're really affordable, have your parents buy you two." For parents, "Not much, I got a great deal." It's like asking how fast the micro-quads I build go...almost everyone wants to know, even though the difficulty in flying something that fits in the palm of your hand is way more important.
  19. It seems common to have difficulty leaning to ride at first, then figure it out, get over-confident, go fast, encounter something unexpected and crash badly. Having a "slow" wheel might save your bacon. (being forced to go slow might save you from getting hurt badly) It also frees up funds for safety gear.
  20. Tesla uses a proprietary battery chemistry that is optimized for use in their vehicles and is otherwise not available outside that narrow usage, so relating Tesla batteries to EUC batteries is generic in the sense that these are different types of lithium batteries, so there are similarities but things are different. Tesla batteries are pre-heated to reduce thermal shock to the battery which would otherwise be caused by charging it extremely quickly, as in going beyond "fast charging" to "super charging." Pre-heating the battery using energy stored in the battery is essentially saving "ra
  21. Drive an SCR off the speaker wire.
  22. @ShanesPlanetis bound to be along any minute... (probably watch the video 6 times before realizing what it's about thanks to his A.D.D.... ) (...and he probably things "George" is pronounced "whore-hey!", which in some countries it is!!! )
  23. @Tawpie, bring it current, man! (said like Biden) (loooong-range audio receiver) The funny thing is old amplifiers are really "smooth" (good quality), it's the speakers that are the weak link--replace the speakers and the sound is often (but not always) phenomenal. ----- There are digital timers with battery backup for the same price...so weekend vs. weekday programs, etc. can be done. I have a fancy one (that costs more) and supports multiple daily (instead of weekly) programs, and it hasn't glitched once. But for ease-of-use, old-school works and you don't have to wo
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