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  1. C

    Newb question: Attempted to connect inverter to battery resulted in bright spark and some melted ring connector. Why?

    Background: I don’t know much about electricity. I have a 14s5p battery that Id connect to my inverter (rated to handle 40-60w DC). The few times ive used the inverted it has never been an issue (always keeping battery under 58v). My battery would connect using Anderson connectors, id turn on...
  2. C

    What is this cell (polymeter li-ion with Chinese writing)?

    Measurements of the single cell: 5.5", 2.5", and 5/8" For the third time my battery from my ebike has failed me. This time I am out of warranty so I took the battery apart and saw it was 13 unknown Chinese 'cells' in series. All of them showed 4.1v, expect for one showing ~0.4v which seems...
  3. C

    Duty question: Any Canadians order a battery from em3ev?

    As the title says, any Canadians order from em3ev? From my understanding batteries are category 4... So this would mean you pay 8% duties plus the GST/HST? So someone from Ontario pays 13+8 = 21% higher then listed price, or am I missing something?
  4. C

    Need a 48v battery, have a few questions

    I have have 500 watt motor (says Shengyi hybrid on it) and some unknown controller. My current pack is dead after storage in the winter (was a 'free' rebuild, I opened it and it looks like they threw in 7 of some sort of polymer batteries). Want to buy a new battery, thinking of a 13S5P Samsung...
  5. C

    Battery suggestion? (feedback on luna?)

    My current battery has been in the 'shop' for about 4 months in Toronto (they put in fake Chinese cells and they failed quickly). Not sure when I am getting it back and I am thinking of buying a spare/backup battery. Current bike uses Anderson connectors. I am thinking of maybe buying this...
  6. C

    Battery charging is less than capacity of battery?

    I got a 48v battery with 10ah. If I run it dead and charge it with a kill-a-watt it tells me it pulled about 0.25 to 0.31 kwh. Shouldn't a 48v x 10Ah = 0.48 khw capacity? If anything shouldn't the kill-a-watt always show over 0.48 kwh as it takes more energy to charge the battery?
  7. C

    Adding extra security to rear mounted battery

    My ebike has a rear mounted battery, the key (3 pins) makes a metal pin slide down into the battery rack plat to 'lock it' (so you can't slide it out). My worry is someone can either pick/rake the 3 pin lock in seconds, or bend the metal rack enough with a screwdriver (or something) so the...
  8. C

    Is this $1500 cad ebike a good buy?

    I am looking at this fat ebike: http://www.daymak.com/pages/classic/wildgoose.php for $1500 CAD locally (no shipping as its a local store, and in theory warranty support locally). Key specs: Motor: 500W Hybrid Pie Brushless Hub Motor Battery: 48V 10AH Lithium, Lithium Ion Polymer, 800...
  9. C

    What do you tihnk of this pre-built bike (1000w)

    First of all, does hallomotor have a good rep here? I am looking at this bike: http://www.hallomotor.com/2015-latest-super-mustang-mountain-e-bike-48v-1000w-electric-bike-with-48v-20ah-li-ion-bottom-discharge-battery-shima-hydraulic-disc-brakes-electric-bicycle.html Seems to have: - 48v 20ah...
  10. C

    How to fit a rear rack on my bike

    I am probably going to buy this battery: http://www.hallomotor.com/2015-latest-48v-20ah-samsung-icr18650-22p-cell-rear-carrier-li-ion-battery-with-flat-aluminium-case-charger-and-bms.html But I need a rear mount rack. Not sure how this would work. If you look at the image I posted, the holes...
  11. C

    Looking at building a bike, got questions

    Hi, My requirements: - The most I would travel travel is 20km (~12.5 miles), but 95% of the time it will be half this distance. - Speed is not important, but 20 KPH up to 30 KPH/18.6MPH should be optimal. - I am about 230 pounds, and there are some 20 degree hills, but also a lot of semi-flat...
  12. C

    Getting started in all of this?

    Note: I know the very basics of electricity and have touched the Arduino uno. Other then that I do not have much knowledge in this field. Hello, I have a 26" mountain bike and want to add a front wheel motor to give me a little boost on my ~10 mile (16km) round trip on some road with hills...
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