[Tip] Yamaha PW - How to check the number of cycles & absolute battery capacity

Discussion in 'Haibike Forum' started by JayVee, Apr 17, 2017.

  1. JayVee

    JayVee Well-Known Member

    I thought I would share this tip because it’s useful when buying a second hand bike. It applies to the frame battery of the PW series drives, but not the PW-X.

    By pressing down the button on the battery for a given amount of time, you can obtain information about:
    • The number of cycles: this tells you how many times the battery has been fully charged.
    • The absolute battery capacity: tells you how much energy storage capacity the battery has lost since it was new. A new battery has an absolute battery capacity of 100%, whereas a battery that has lost 26% of its energy capacity will have an absolute battery capacity of 74%. The absolute battery capacity is expressed in 25% increments.
    Determining the number of battery cycles

    The leds are assigned numbers in the following order:

    4 ---- (F)
    3 ---
    2 --
    1 - (E)

    Press the button on your battery for 20 seconds. The following led combinations give you the number of cycles:

    Led 1 Blinking: 0 to 100 cycles
    Led 1 On: 101 to 200 cycles

    Led 1, 2 Blinking: 201 to 300 cycles
    Led 1, 2 On: 301 to 400 cycles

    Led 1, 2, 3 Blinking: 401 to 500 cycles
    Led 1, 2, 3 On: 501 to 600 cycles

    Led 1, 2, 3, 4 Blinking: 601 to 700 cycles
    Let 1, 2, 3, 4 On: 701 or more cycles

    Note: A new battery should only have led 1 blinking.


    Determining the absolute battery capacity

    The leds are ordered in the same manner as for the previous test.

    Press the button on your battery for 30 seconds. The following led combinations give you the absolute capacity:

    Led 1 on: 0 to 24 % capacity
    Led 1, 2 on: 25% to 49% capacity
    Led 1, 2, 3 on: 50 to 74% capacity
    Led 1, 2, 3, 4 on: 75 to 100% capacity

    Note: A new battery should have all 4 leds turned on.
     


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  3. DanielGlacial

    DanielGlacial New Member

    Will be nice people showing the stats and then you can get an estimate how long the battery last. If you can get 3 years its good i think.
    You would think it would be easier to show numbers in display ?
     
  4. JayVee

    JayVee Well-Known Member

    Mine's almost new, it shows 0 to 100 cycles and an absolute battery capacity of 75 to 100%. I'm curious to see after how many cycles the absolute battery capacity will drop under 75%.
     
  5. fxr3

    fxr3 Active Member

    Thats a sweet useful feature for sure.
     
  6. Ann M.

    Ann M. Administrator

    Thanks @JayVee, this is some handy info; please provide the source for your data. Documentation always rocks! :)
     
  7. JayVee

    JayVee Well-Known Member

    It comes straight from the Yamaha service manual. :)
     
    Ann M. likes this.
  8. JayVee

    JayVee Well-Known Member

    I'm now at 3300 kilometers ridden and have between 101 to 200 cycles (1st light is solid).

    Absolutely battery capacity is still between 75 and 100% (4 solids bars displayed).
     
  9. Svein Tore

    Svein Tore New Member

    Anyone seen a way to read the kilometers ridden with the LED display? Have checked the service manual but could not find any info.
     
  10. JayVee

    JayVee Well-Known Member

    5200 kilometres on the bike:

    - Absolute battery capacity 100% (or to be more precise, somewhere between 75 and 100%)
    - I have leds 1 and 2 blinking, whereas a week ago only 1 was blinking. So I have roughly 200 cycles.

    I've figured out that 1 partial charge = 1 cycle.
     
  11. tallpaul

    tallpaul Member

    Anyone know if there is any way to check this on a Bosch battery system?
     
  12. Ravi Kempaiah

    Ravi Kempaiah Well-Known Member

    Any Bosch certified dealer can connect to your bike and see a whole bunch of information related to your motor, battery, cycles, temperature, speed etc.
    If they print the service document, it will show the # of cycles on your battery.
     
    Sweetwater likes this.
  13. Sweetwater

    Sweetwater New Member

    I'm curious about battery cycles.
    When a battery is fully charged after a full discharge or fully charged after a 25-50% discharge, do these count a full cycles?
    I have pulled the charger at 80% several times when I knew I wouldn't need a full charge for my next ride, another full cycle?
    My impression of the Li-ion battery packs is that they prefer a wide range of use to charge, draw them down then fill them up.
    But that doesn't always match real life use.
    No other way to evaluate other than the dealer hookup and software?
    Bosch dealers in my area decline to work on bikes they did not sell.
     
  14. Ravi Kempaiah

    Ravi Kempaiah Well-Known Member

    It's hard to say.
    When I updated my bike, I got to see the document and it clearly mentioned less # of cycles and I think it is because I never let it go below 1 bar and stop charging as it hits the 5th bar.
    What % range accounts for 1 full charge, it is hard to say but if you are not doing deep charging/discharging, you will get few more cycles of life and this I can say from my experience so far.
    So, my battery hasn't showed any sign of capacity loss even after 5000 miles. I alternate b/w 400pack and 500 pack.
     
    Sweetwater likes this.