Joined in 2023 
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63 About this deal
I weigh 220lbs and all of these bikes have upgraded gearing (53T crank and 11 speed mag) except the Bikonit, it still has the OEM 42T crank.
EM3ev is very well known throughout the eBike kit world, custom bike DIY fellas, and with high end custom bikes like wattwagon. The answer is that, unless you are seriously budget or weight constrained, this would probably be a bad battery investment. It might fit the bill initially for your commuting needs, but then it doesn't really leave any reserve if you need to run some errands on the way home or forget to charge it up one night etc. Even worse, as the battery ages over time, the capacity drops. After a year your 8Ah battery is now only 7Ah, it's only barely able to do your daily commute, and the next year when it is just 6Ah you now need to carry the charger with you and top it up at work every day. It makes very little difference whether you have a small geared motor, a large direct drive motor, or a mid-drive motor. The mileage and range figures for a given battery have to do with how you use the ebike, not which motor system is on the bike.With a multi-protection functions such as the stall, over-current, over-temperature, under-voltage, speed driving, phase shortage, output short circuit etc., so as to protect the vehicle electronic control systems and traffic safety; I've had an increasing number of bad experiences in recent years with buying "premium" known brands - including LG, a product that failed catastrophically straight out-of-the-box. To me, these brands mostly seem to thrive now on past glories and reputations rather than current merit. Low temperature use ---- During winter use (particularly below 0°C) we recommend charging and storing the battery at room temperature before inserting the battery in the eBike immediately before riding it. For longer journeys in the cold, it is advisable to use thermal protective covers. Our Jumbo Shark comes with a high current charge plug, rated for around 8A. Our 2-wire type BMS means you can actually safely charge through the discharge leads as well. What you could better do imho is adding a maritime switch with a high amps rating (over 100a). This switch should work fine on its own:
https://myelectricbikemotor com/electric-mountain-ebike-e-nzo-diamond-36v-250w-motor-full-suspension-e-bike/ We used to have the smaller Hailong-01 enclosure in 36V 16.5Ah (10s 5p) layouts suitable for 20-25A current setups, and the larger Hailong-03 enclosure in a 52V 16.5Ah (14s 5p) size for higher current and capacity, but we have nowswitched to only Reention Poly-DP casings for a standardized cradle, stronger casing, and more reliable connectors. For extra large capacity (>1 KWhr), we have the Reention DP-9C casings in 36V 26.5Ah and 52V 20Ah formats.We also have downtube enclosures for the larger 21700 cell format and have these available in 36V 14.5Ah, 36V 19.5Ah, 52V 14.5Ahand 72V 9.5Ah options with Panasonics NCR21700Acells (same as used on Telsa 3), and also in a 72V 7.5Ah format using the very high power capable Samsung 40T cells. Cleaning ---- Cleaning with a direct water jet is impermissible, in particular to protect the electronic components. Before cleaning the eBike, remove the battery. Occasionally clean and lightly grease the connection port. Of course, if you go really fast or are pulling an extra load, then this mileage will be worse, like 12-15 wh/km. On the other hand, if you use the motor more sparingly, then you can easily stretch it down to 6-8 wh/km. The table below summarizes the expected range for these different example batteries under light, average, and heavy usage paradigms:I'm not aware of any data that corelates battery failures by brand. The best rule of thumb is, "you get what you pay for". There are many internal considerations including cell type, wiring, construction, BMS, etc. Unfortunately, there is no such thing as a high quality low cost lithium battery. https://myelectricbikemotor com/electric-scooter-moped-bike-850w-48v-brushless-motor-lifep04li-ion-20ah-battery/
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