A Question to all Batterie Problem Jumpers

A Question to all Batterie Problem Jumpers

TechTablets Forums Jumper Discussion EZBook series A Question to all Batterie Problem Jumpers

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  • #143579
    Chupa
    Participant
    • Posts: 880

    Do you have 12V 2A or 12V 3A power supply?

    Need Help?
    1981 soldered my first Sinclair computer 1K, tapedeck * 1984 build and sold IBM clones 8Mhz, 512K, 20MB HDD * 2018 messing with ultrabooks

    #143582
    Greedo77
    Participant
    • Posts: 32

    12v 3mA by the looks of it (thats the power supply that came with the laptop).

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    #143587
    airbites
    Participant
    • Posts: 44

    No 12V 3 mA only 12V 3A. I’m surprised that you do not have a “CE” certificate on the power adapter.

    #143588
    Sx C
    Participant
    • Posts: 117

    My v3 pro comes with a 12v 3a charger, interestingly enough my other ezbook 3 plus only has a 12v 2a one. I use the 2 charger interchangeably(along with a 12v 2a from the chuwi lapbook) and there is no difference in charging time.

    Anyway i doubt that it is the cause of the batteries problem. Its probably just very poor battery quality, my lapbook 14.1 has at least 500 charge cycles now and i have lost maybe 10% of the capacity.

    Ironic but im glad that jumper pulled a fast one on me by putting a TN panel on the ezbook 3 plus, if not i would have recommended the ezbook 3 pro to so many people and will have all these dud batteries on my account.

    #143590
    Chupa
    Participant
    • Posts: 880

    The idea with the charger came me when I saw the first 3A charger mentioned. In the older models also in my 14″ 3s and Thomson (identical with Jumper 3 pro) there is a 12V 2A charger used.
    I wonder If Jumper decided to follow the trend of fast charging and this leads to more heat and a quick death.
    It would be interesting to know how much power is used charging a near empty battery.

    The 12V 2A charger should have 24Watt maximum.
    It gets charged with 28 Watt with a half empty battery and full screen brightness typing this.
    Closing the lid and going in sleep mode the charge falls back to 20Watt

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    Need Help?
    1981 soldered my first Sinclair computer 1K, tapedeck * 1984 build and sold IBM clones 8Mhz, 512K, 20MB HDD * 2018 messing with ultrabooks

    #143593
    euplio
    Participant
    • Posts: 28

    Also mine 12V 3A and my battery now last 1 minute. Already waiting for new batteries from Ali. Do you @chupa think problem is caused by charger? Cause I don’t want my new battery to Death like original one.

    #143595
    SB
    Participant
    • Posts: 40

    mine was also 12v/3a, and battery died rapidly during last 2 weeks. 2 weeks ago it last for 3h, now 15m on idle. it even discharge a lot then notebook is powered off – 100% charged and when windows boot it is 60% already.

    #143598
    Chupa
    Participant
    • Posts: 880

    People, I have no idea if the charger is the problem, this is why I need some measurements.
    If the 36 Watt charger works with a high initial charge and the battery is not designed for that, then there is a problem.
    It would be interesting to know when Jumper switched from the 2A charger to the 3A charger – V5 or V6?

    Need Help?
    1981 soldered my first Sinclair computer 1K, tapedeck * 1984 build and sold IBM clones 8Mhz, 512K, 20MB HDD * 2018 messing with ultrabooks

    #143600
    Sx C
    Participant
    • Posts: 117

    I have sold my ezbook 3 pro with the 3A charger so cant really confirm but if memory serves me right it does not charge faster than 15-16w regardless of which charger i am using, the only difference is that if i am on 100% brightness and taxing the cpu etc the charging rate will drop if i am using the 2A charger.

    my guess is jumper configured the battery to overcharge and over discharge to squeeze out at much battery life as possible during the first few weeks. anyone with a multi meter could test the full charge voltage and report here or at any of the battery thread.

    As for the inherent quality of the battery those with a newish one could also test it with the aid of a battery monitoring software like hwinfo.

    first, take not of the full charge voltage with the charger plugged in, turn the notebook to the lowest brightness and turn off all function like wifi and bluetooth etc, note the voltage when the charger was removed.

    Next, tax the battery as much as possible by going 100% brightness and running benchmark etc and take a reading of the voltage again.

    for comparison sake my 500 charged cycle lapbook battery dropped from 8.41 to 8.32 while doing almost nothing and further dropped to 8.20 when i am running a benchmark on 100% brightness.

    a poor and/or aged battery will immediately drop to less than 8v when taxed in any capacity.

    Not an exact science for battery testing but it is a good rule of thumb when specialised equipment are not at hand

    #143608
    SB
    Participant
    • Posts: 40

    mine has bios from dec 2017, not sure which version it is. at the back of ezbook there is also engraved label 3a/12v.

    #143624
    jose
    Participant
    • Posts: 17

    bios 11/6/2017. 12v 3a

    #143748
    dAFUQQR
    Participant
    • Posts: 9

    12v 3a

    #143750
    lations
    Participant
    • Posts: 72

    My bios is 2/1/2018 (the latest I think), charger is of course also 12v 3a

     

    I’ve had my Pro for a couple of days now.

    Last night I drained battery fully, then charged overnight. When I woke up, LED was green which indicates full charge. But upon turning on the laptop, it was at 93%! And it went down by 2% or 3% within a few minutes of normal internet usage. BatteryBar reported “4.5 hours left” which seems quite short. Could this be inaccurate? Because Windows says 9 hours remaining, whereas Batterybar says 4.5 hours remaining…..

     

    Anyway I plugged it in again after that, and it charged to 99%. But it’s very weird that it stopped at 93% before that and the LED was green. Why?

    #143764
    Chupa
    Participant
    • Posts: 880

    posting the same question over 5 threads will not bring you more clarity.

    you have a defective Jumper as most v6 and v7 are.

    SEND IT BACK IT IS DEFECTIVE!

    having a defect or flaw; faulty; imperfect: a defective machine.

    Need Help?
    1981 soldered my first Sinclair computer 1K, tapedeck * 1984 build and sold IBM clones 8Mhz, 512K, 20MB HDD * 2018 messing with ultrabooks

    #143775
    lations
    Participant
    • Posts: 72

    posting the same question over 5 threads will not bring you more clarity. you have a defective Jumper as most v6 and v7 are. SEND IT BACK IT IS DEFECTIVE! having a defect or flaw; faulty; imperfect: a defective machine.

     

    You’re right, my apologies, it’s just that there’s several threads that all have the same topic and I’m quite stressed out by this as I want to figure out if it actually needs a replacement or not, as I need it for travel in a month. I’m also really concerned that their replacement process will take ages, or they might say “there’s nothing wrong with it”

    Having said that – as I’m sure you noticed in the other battery thread, I might be having some luck, so I’ll try another discharge cycle.

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