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  1. velowatt

    Intermittent controller fail?

    I have technical question for the ES brain trust! Been using an older bike for a short hilly commute to work. Throttle has an indicator with an on-off switch for the controller, and a 3-LED light system to indicate battery level (high, med, low). The brake levels have reed switches that cut...
  2. velowatt

    "Durable" chargers?

    I use LiFePO4 (Headway cells with BMS), have a 36V pack. The charger came from Mr. Ping, and crapped out after about a year of use (won't power up now at all). I recently knocked the charger off a shelf (2 foot drop to floor when I tripped over cord), so that may have destroyed it. I never...
  3. velowatt

    Capacitance balancing BMS connection

    I am repairing a 36V LiFePO4 (12 Headway 10 Ah cells in series) which was damaged by a failed BMS (took 6 of the cells down to zero volts without cutoff, the others remained above 2.8V and appear undamaged). I have replaced damaged cells, and bought a BMS board from evassemble. I want be be...
  4. velowatt

    BMS Problem = Toasted Cells?

    I built a 12s Headway pack (10Ah cells) for nominal 36V run through a older-style "Signalab" 12- channel BMS board (same as on the V1 Ping packs). After taking the pack out for a longish ride, I got a bit over 5Ah before the voltage (total pack) sagged to 32V, which seems low. I went to charge...
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