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Found 6 results

  1. So after climbing a mountain twice this morning I put Lassie on charge and went ocean side riding in the afternoon. On my way home, aware that my battery was down below 50% I was keeping it gentle; no sudden current spikes to trip the low current protection (also know as "get the fock off me you pig") Approaching a (estimated) 4* up, bike ramp about 20m long, I decided to try something ( what could possibly go wrong, right?). Theory; maintain my approx. 20 kph speed onto the ramp, and then bleed my speed off so as to not spike current demand. WRONG!! Lassie got there before me and decided to invoke "get the hell off me you pig" and off I went, up the ramp "a pied" while Lassie crashed out and went into the usual death throws. Apparently, I managed to flap sufficiently, because I didn't FP. But I was wearing my ATGATT, so, it's all good. MORAL OF THE STORY: DON'T DISRESPECT POTENTIAL LOW BATTERY POWER SPIKE SHUTDOWNS, THEY BITE.
  2. I have a Gotway MCM4 which is using Panasonic NCR18650PF battery cells, like lots of recent Gotway and Kingsong wheels. I have found these informations which indicate that fast charging (5A or 3,5A - 4A using 2 chargers) may not be good for 340Wh and smaller battery packs. General NCR18650 series : cell at 10°C or below : charge at 0,35C = 1,89 A (2P / 340Wh) ---- MAX charging is 0,7C = 3,78A (2P / 340Wh) NCR18650PF : standard is 0,5C = 2,7A between 10°C and 45°C For general information as I dont know if these are used in wheels : NCR18650B (used before 18650PF) : 0,25C at 10°C and below, MAX is 0,5C (same apply for NCR18650F) So it would be recommended to check a wheel battery cell specs before applying a higher charge current as wheel as the room temperature. And maybe do not put to charge just after riding if it too hot or cold outside.
  3. I’m going give a head to head comparison between the IPS Lhotz 340 and the T680+(a.k.a. “Tank” or 151/152, or T500 which is mentioned on the box; the fine art of marketing cleary has not trickled down to IPS yet ). I’ll split the review up in several parts, as this will make it easier to comment and/or ask questions. After combing through most threads on brands, BMS, motor, battery, FP or not to FP, etc., I count myself lucky to have bought a Lhotz340Wh (older version with torque biased motor, limited to 20KmH) august last year. So why did I buy the IPS 680+? Lhotz Design: The broader (2,5inch) and larger tyre which actually makes the wheel around >1inch bigger than the one of th IPS680+ results in good traction and stability. It has relatively long pedals (22cm, you can scrape the corner of the pedals on the ground in tight turns) so you can place your feet exactly where you want them depending on what you want to do, which improves control over the wheel. The pedals are made of solid painted aluminum, they are not that thick and I tend to feel some flex (real flex or the hinges, fixtures?). Because of the paint the pedals are quite slippery when wet, this is nothing a patch of skate board tape cannot cure. The body (15cm wide) tapers off towards the edges and there’s no protruding battery housing at the top, so there’s room for the inner side of your calfs (no pressure) and you can put your feet close to the center which is great for stability and control. As a consequence the biggest pressure is on the inside of the ankles instead of the calfs. There’s here and there in strategic places soft rubber-like bright red padding (the brownread stuff on the pictures is my doing), with a high friction surface which is great for improving control over the wheel. The case has broad cut-outs front and back, so negotiation small obstacles like branches on the road poses no problem at all. The Lhotz is very sturdy by design, no rattles or creaks if you pressure it, and the handle is stainless steel so it doesn’t break even if you wheel bounces downhill without you. This all comes at a weight penalty of course: 14 kg. The round stainless tube of which the handle is made doesn’t improve the weight perception when carrying it, it’s slippery and cold in winter (I’m now using a samsonite belt to carry it). I don’t understand why IPS put a plastic slide-on charging port cover on it, which doesn’t stick for more than a minute. To save weight perhaps, really??? (I replaced it by an aftermarket metal screw cap)The battery charger is a very light box with an active cooling system (which doesn’t inspire a lot of trust, what happens if the ventilator dies?), and a US style wall plug (an EU adapter was sold separately) Verdict: Excellent Lhotz Safety: The Lhotz has enough torque to cope with my 100Kg adequately but it’s not perfect, I’ve had 2 FP, 1 overtorqueing when acceleration too fast from standstill, and 1 on a slight downward slope riding in a pit when at it’s cruising speed. When I push the weel, I can feel it (the motor?) struggling and (I believe) the BMS sometimes cuts in fractions of a second when the battery is drained too fast. I’ve experienced no BMS cut-outs though; when the batt level decreases the pedals start tilting at lower speeds and the weel starts beeping if you try to push it, even at very low speeds the tiltback is quite strong so there seems to be plenty of reserve programmed into the BMS. Therefor I would consider the Lhotz by design a relatively safe wheel, the flipside is that below 50% batt level the wheel is no fun to ride at all, and it’s game over below 30%. Verdict: Very good Lhotz Range/speed: Even with the torque biased motor, limited to 20KmH, it doesn’t feel that stable at the 17KmH cruising speed (see safety topic above). At 17KmH cruising speed, it drains 50% of the battery in about 12km. I live in a small village, and for shopping, the library, public administration, etc. I have to commute to the main village of the region which is at 5km one way. 12Km max range is not enough, driving around a bit for the shopping, windy conditions, low temp, and I barely can get home. There’s no fun in carrying a 14kg wheel, believe me, this causes me quite a bit of range anxiety. My wife already had to come and ‘save’ me by car, because I forgot the evening before that I rode just a very short distance and didn’t charge it to a full 100% (I try to avoid this because it’s not good for the battery). So if a guy of my size needs a cruising range of >15Km at a cruising speed of 20-25KmH, 340Wh is nearly not enough. Adequate. Which brings me to my choice of the T680+: Looking around, I saw no 16” alternatives from a reputed brand with such a big battery and a proven design (the KS16 is brand new). With the T680+ I hope to find (almost) the same build quality, high torque motor, and decent safety features, all this for a price of 1,129.- USD (delivery and taxes included) delivered to my door in Belgium straight from the IamIPS factory in just 12 days.
  4. Jaumebyn

    Where to buy IPS191 340Wh cheapest?

    Hey people Someone knows where I can buy the IPS191 cheapest? I've seen this web http://shopelectricunicycle.com/ but I distrust. Thanks!
  5. adhermes

    IPS Lhotz 340wh from Amazon

    So I received my IPS LHOTZ from Amazon yesterday (yay for 24 hour delivery!) and spent a few hours riding it today with a friend. I thought I would give some impression and compare it to my King Song 840wh 800w 14" unit. Beautiful- the case and aesthetic is simply gorgeous on this unit. The King Song doesn't even compare in this department. 10/10 for sure. Smoothness of ride- Man is it smooth! The 2.5" tire makes for such a nice ride. I much prefer the actual ride on this unit to my King Song by quite a bit. Bumps and riding in the grass are no problem on this unit. Power- the unit is surprisingly powerful for climbing and acceleration. I haven't really felt a difference between this one and the King Song yet. Speed- this is a mark against the unit, at least for now. I haven't ridden the 50KM yet so I'm stuck at an 18KM/H tilt back, which feels quite slow to be honest. I will update this part of my impression once I unlock the advanced mode. Bluetooth/App- This stinks. Only the IAMIPS app works, which is not near as nice of an APP as the LHOTZ or Xima apps. It constantly disconnects and then fails to find the wheel. I have to stop, power off the unit, force close the application, turn off my bluetooth on my phone, turn it back on, turn the wheel back on, and relaunch the application just to get it to reconnect. HUGE pain. The user created app does NOT work on this unit. TiltBack- The tiltback on this model is pretty smooth and you really can't force through the tilt back. Definitely has a more pronounced feeling of tiltback compared to the King Song. Handling- handling is great. The ride is smooth and the unit is near-silent, especially compared to my King Song. I have no problems doing extremely tight turns on this unit. Cons: No headlight/break light. This really stinks and will require me to purchase one for my helmet. Annoying, but certainly not a deal breaker Until unlocked, very low speed Bluetooth stinks No speakers Side padding is awful (non-issue for me because I always wear shin guards and high top hiking boots) Pro's: Extremely comfortable / great pedals! No need to add grip tape to the pedals Gorgeous - definitely turns heads LED lights are sweet looking Fast charging - app better than King Song app but connectivity issues ruins it Price is pretty good (sub $1000 on Amazon delivered) / great return policy. Overall, better than the Ninebot E+ for roughly the same price (my friend just bought an E+ and it's definitely good, but I prefer the larger tire and aesthetics of the LHOTZ) With all this being said, unless after unlocking it feels substantially faster, I will be returning it in favor of an 1100w King Song KS18A with 1360wh battery. Hopefully this review helps potential owners make a decision!
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