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Chord Mojo DAC-amp ☆★►FAQ in 3rd post!◄★☆

Discussion in 'Portable Source Gear' started by Mython, Oct 14, 2015.
  1. zerolight
    If money was a huge concern I'd probably not have bought this. If money was of no concern I'd have waited on the Hugo2. Either way the DFR would have been sold. Once the DFR novelty wore off I just found it made things a little bit harsh and bright, and it felt like it was eqing the sound to bring out details and adding reverb or something to create soundstage. I preferred my iPhone without it. So I say the Mojo is worth the premium over the DFR, but it's at the upper end of what I'd be willing to pay. Whether it is better than the dacs listed elsewhere I cannot say, but the reviews would seem to suggest it's the best dac at its own price point and we'll above. Good enough for me for sure.
     
  2. psikey
    Sure, I don't have the cash like some do to spend on a wide range of audio gear. I read lots of feedback on here and of course pro reviews. I have now settled on the Mojo as DAC/AMP and SE846's as earphones. I'd love to try something like a Hugo 2 with a pair of Noble K10U but I could never justify the cost to myself so no point.

    Now if I could only keep the Mojo or the SE846's the Mojo would be gone and back to output from my phone. The earphones were the big noticeable step up for me in audio with the Mojo being the iceing on the cake (I don't use headphones).

    Sent from my SM-G930F using Tapatalk
     
  3. x RELIC x Contributor

    Your toothbrush is getting noticibly less battery life precisely because of the way you are charging it. Lithium batteries do not have a 'memory effect' and it's well established that short charges, more often, are better for the lifespan of lithium batteries. They do no behave the same as NiMh or NiCad batteries and charging them to full and draining to dead on a regular basis is bad for lithium batteries.

    Once again, here is a highly suggested read on the subject:

    http://batteryuniversity.com/learn/article/how_to_prolong_lithium_based_batteries
     
  4. KwyjiboVenneri
    What kind of daps are you guys using? I was looking for some input. 
     
  5. TG04
    Wow, I had no idea ... thank you for this information.  The article is a little too dense for my attention span, is the recommendation to run on battery power most of the time and to recharge whenever the opportunity arises?
     
  6. miketlse
     
    There is more info in post #3, explained at an easier level.
     
    How many charge/discharge cycles is the Mojo battery going to last ? (Click to hide)
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    Is it alright to leave Mojo plugged in, 24/7? (Click to hide)
     
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    RobinTim likes this.
  7. x RELIC x Contributor

    Yes. Basically you can almost double the useable lifespan of lithium batteries by charging to only 86%. Conversely, when draining to 20% of the depth of discharge you also gain significant useable charge cycles compared to a full discharge.

    Now, for something like the Mojo the total charge Voltage is difficult to monitor precisely so my recommendation is to charge it until full but remove from the charger when you see the light go out and then only drain to a point before the battery indicator turns red for typical charging. Once in a while (about once a month or two) I would do a full charge and then a full drain to calibrate the battery meter. Regular short charge cycles will not harm the battery if you only have, say, 75-50-25% battery left.

    Chord has mentioned many times in this thread that the Mojo's battery is robust and can be left plugged in all the time, but I err on the side of caution with all my lithium battery devices with regard to this and they have all performed very well once I've adopted these charging habits, including my electric toothbrush. :wink:
     
  8. x RELIC x Contributor

    And yet some users who have had Mojo plugged in continuously for months on end have reported very short battery life. Coincidence?

    It's noted that lithium batteries are 'stressed' when kept at a Voltage of 4.10 and above so leaving a device plugged in all the time is not optimal when it is constantly 'topped up'. The Mojo 'tops up' and keeps the battery close to the charge ceiling when left plugged in. I suppose it's up to each user to figure out how they would be best served with regard to leaving the device plugged in.
     
  9. TG04
    Superbly useful information.  Again, thank you very much // TG
     
  10. miketlse
     
    I don't know if it is coincidence.
    In any case you need to put 'some users' in context:
    The Mojo serial numbers are well into the 40,000s now, and presumably many thousands of users leave their Mojo plugged in continually, but only a handful have issues.
    That would suggest that the battery problems are the exception, rather than the norm. 
     
  11. x RELIC x Contributor

    Yes, agreed. I'm just throwing out a caution as I've experienced lithium battery issues from leaving them plugged in 24/7 for months on end with laptops and portable devices (I haven't done this with the Mojo and am not about to risk it). Obviously not all devices have the same charging scheme but better safe than sorry I like to say.
     
    miketlse likes this.
  12. warrior1975
    I don't think that it's safe to estimate thousands leave their mojo plugged in all the time. We really have no idea. But, there are definitely a handful here that do, out of that handful how many have experienced poor battery life?

    I'm with relic on this, I'd error on the side of caution if you want to prolong your battery life. Personally, I don't really care as I'm sure I won't have the same mojo in 5 years, or 3, probably not even next year.
     
  13. Music Alchemist
    Two interesting things I have noticed about two of my headphones:
     
    The KTXPRO1 distorts at a certain (high) volume no matter how powerful the amp is. Its power handling capacity must be below average.
     
    On this track, the HD 800 picks up articulation in the bass line that I have never heard before. On other headphones I have tested it with, it just sounds like the same note being played repeatedly in the same way.
     
     
    Looks like my normal use fits that description. Lucky me!
     
    I charge it once I turn the computer on soon after waking up. Usually by the time I turn the Mojo on to use it, it has finished charging. Since I am only using the supplied cable, I switch from the charging port to the data input, so it is never charging while in use. I use it for videos as well. When the day is done, the battery state indicator is at yellow. (Perhaps sometimes red.)
     
  14. miketlse
    one thousand users, would represent approximately 2% of the total number of Mojo users.
    So even if only a small percentage of Mojo owners leave theirs plugged in continually, it can easily represent thousands.
     
  15. Dobrescu George
     
    Why would one never plug it out though? 
     
    I mean, just to make a habit - leave it to discharge once in a few days - just to be save
     

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