Chord Mojo(1) DAC-amp ☆★►FAQ in 3rd post!◄★☆

[OK-Guy]

Ah! Now that makes sense.

 

 
you do know he's a deranged lunatic right?

 

[Duke40]

I am interested in the Chord Mojo, though I have some battery charging questions.
 
Downloaded the manual, it says I need at least 1 Amp ...  I have a spare iPad charger wall wart (2 Amp @ 5 Volts),  instead of using the apple lightning cable that comes with the iPad charger I think I could just use the USB A >Micro cable that Chord supplies with the Mojo, plugging that into the iPad charger wall wart.
So ...  iPad Charger >> Chord USB Micro cable >> Chord Mojo
 
Would I be able to use this to charge the Mojo ?
 
When not using the Mojo to listen to music, would it be OK to leave the Mojo powered on and attached to the charger ?
 
Reason for the above question, is that it is similar in how I treat my iPhone, that is, when I get home and it is not going to be used, I just plug it into the charger and leave it attached overnight (rather than unplugging from the charger as soon as I reach 100% battery), iPhone seems to keep good battery health this way (rather than constantly letting them run down).  I suppose this is really a question of battery care "best practise".
 
Thanks to everyone for taking the time on posting their impressions of the Mojo (especially paired with the AKG K3003), I appreciate it.
I have long been curious of hearing Chord products given their excellent reputation, at this price point the Mojo is certainly very attractive and I should be able to have a demo in the next fortnight.

 

[Duncan]

I have an intelligent charger that has little lights on it that shows if a device is pulling current or not, even when the white light goes off on the MoJo there is still a little bit of current being drawn, so assume is trickle charging so as to keep battery at full, so all is okay there I'm sure

Oh, OK-Guy, yup, mad as a box of frogs, especially when I dream about batteries running out of charge, guess I need to get out more, trouble is, more I go out, the more I use the MoJo, so it's actually exaggerating my problem... Erm, maybe I need to stay in more, but then I'll spend more time (and money!) on the forums... Vicious circle!

Think I need those guys in white coats to pay me a visit!

 

[Duke40]

I have an intelligent charger that has little lights on it that shows if a device is pulling current or not, even when the white light goes off on the MoJo there is still a little bit of current being drawn, so assume is trickle charging so as to keep battery at full, so all is okay there I'm sure

Oh, @OK-Guy, yup, mad as a box of frogs, especially when I dream about batteries running out of charge, guess I need to get out more, trouble is, more I go out, the more I use the MoJo, so it's actually exaggerating my problem... Erm, maybe I need to stay in more, but then I'll spend more time (and money!) on the forums... Vicious circle!

Think I need those guys in white coats to pay me a visit!

@ Duncan ... that was quick response, Thanks for your help !

 

[x RELIC x]

I am interested in the Chord Mojo, though I have some battery charging questions.

Downloaded the manual, it says I need at least 1 Amp ...  I have a spare iPad charger wall wart (2 Amp @ 5 Volts),  instead of using the apple lightning cable that comes with the iPad charger I think I could just use the USB A >Micro cable that Chord supplies with the Mojo, plugging that into the iPad charger wall wart.
So ...  iPad Charger >> Chord USB Micro cable >> Chord Mojo

Would I be able to use this to charge the Mojo ?

When not using the Mojo to listen to music, would it be OK to leave the Mojo powered on and attached to the charger ?

Reason for the above question, is that it is similar in how I treat my iPhone, that is, when I get home and it is not going to be used, I just plug it into the charger and leave it attached overnight (rather than unplugging from the charger as soon as I reach 100% battery), iPhone seems to keep good battery health this way (rather than constantly letting them run down).  I suppose this is really a question of battery care "best practise".

Thanks to everyone for taking the time on posting their impressions of the Mojo (especially paired with the AKG K3003), I appreciate it.
I have long been curious of hearing Chord products given their excellent reputation, at this price point the Mojo is certainly very attractive and I should be able to have a demo in the next fortnight.

The iPad charger should be fine, but for lithium ion batteries, in general, the longer you have it at full charge the shorter the overall lifespan of the battery. Not sure if the same applies to the dry cel lithium polymer in the MoJo.

You can read about lithium ion lifespan here:

http://batteryuniversity.com/learn/article/how_to_prolong_lithium_based_batteries

"Besides selecting the best-suited voltage thresholds for a given application, a regular Li-ion should not remain at the high-voltage ceiling of 4.20V/cell for an extended time. When fully charged, remove the battery and allow to voltage to revert to a more natural level. This is like relaxing the muscles after strenuous exercise. Although a properly functioning Li-ion charger will terminate charge when the battery is full, some chargers apply a topping charge if the battery terminal voltage drops to a given level."

 

[OK-Guy]

Oh, @OK-Guy, yup, mad as a box of frogs,

 
you have a weird mojo going on mate (keeping on topic) but kinda interesting... what happens when you open the box?

 

[Duncan]

You can read about lithium ion lifespan here:

http://batteryuniversity.com/learn/article/how_to_prolong_lithium_based_batteries

cannot quote indented quotes on mobile, however in the case of my charger, for all tablets, phones and my ecig that I charge with it, when charging is complete it shows no current whatsoever being drawn, so this is definitely something the MoJo is calling for, rather than being force fed.

 

[Duke40]

@ x RELIC x       thank you for the Battery University link !
 
I read it and noticed " Exposing the battery to high temperature and dwelling in a full state-of-charge for an extended time can be more stressful than cycling."
as well as the part you quoted.  Noted that the article is for Lithium Ion batteries (rather than the dry cell Lithium polymer of the Chord Mojo)
 
So, I think the best thing for me to do is just remove it from the charger once it reaches 100%

 

[Duncan]

@ x RELIC x       thank you for the Battery University link !

I read it and noticed "[COLOR=333333] Exposing the battery to high temperature and dwelling in a full state-of-charge for an extended time can be more stressful than cycling.[/COLOR]"
as well as the part you quoted.  Noted that the article is for Lithium Ion batteries (rather than the dry cell Lithium polymer of the Chord Mojo)

So, I think the best thing for me to do is just remove it from the charger once it reaches 100%

Would be interesting to get Chords take on it, as a lot of devices charge at full speed to say 90% and then trickle in the rest, what I noticed with my charger, bearing in mind this device isn't even 100hrs old yet, could just be part of what should happen (i.e. I haven't left it in that state for days on end, and FWIW in that state, the device is as cool as a cucumber )

Edit: let us not forget that in the instructions it says to charge for 10hrs, the white light stays on for way less time than that, so that adds to the trickle charge thoughts...

you have a weird mojo going on mate (keeping on topic) but kinda interesting... what happens when you open the box?

Depends if the box was air tight or not.

 

[x RELIC x]

@ x RELIC x       thank you for the Battery University link !

I read it and noticed "[COLOR=333333] Exposing the battery to high temperature and dwelling in a full state-of-charge for an extended time can be more stressful than cycling.[/COLOR]"
as well as the part you quoted.  Noted that the article is for Lithium Ion batteries (rather than the dry cell Lithium polymer of the Chord Mojo)

So, I think the best thing for me to do is just remove it from the charger once it reaches 100%

To be honest I'm sure Chord has implemented the proper battery circuitry for long life operation so I wouldn't be that worried about it. Plus, can you really just leave it on the charger and not listen to it for long? :tongue_smile:

I more or less posted the link as many people have misconceptions about keeping their batteries at full charge for extended periods of time. I've had a few batteries in the past die prematurely on me for this exact reason. Giving back to the community and all that.

Duncan to be clear I was talking about keeping it at max charge for prolonged periods. Like maxing the RPMs on your car in park for too long. Very stressful. Same thing they are saying about lithium ion, even on trickle (again not exactly the same as li-po in the MoJo). I agree, it would be interesting to get Chords take on it.

Almost all lithium chargers slow down significantly after 90%. It's a safety thing I don't want to get into and derail the thread further.

 

[Duke40]

Originally Posted by Duncan /img/forum/go_quote.gif
 
Would be interesting to get Chords take on it, as a lot of devices charge at full speed to say 90% and then trickle in the rest, what I noticed with my charger, bearing in mind this device isn't even 100hrs old yet, could just be part of what should happen (i.e. I haven't left it in that state for days on end, and FWIW in that state, the device is as cool as a cucumber

)

Edit: let us not forget that in the instructions it says to charge for 10hrs, the white light stays on for way less time than that, so that adds to the trickle charge thoughts...
 

 
+ 1    agree, it would be good to know Chords take on it.  Thanks again !
 
Have found a place where I can demo both the Chord Mojo and the Oppo HA-2 at the end of the month, but this thread has been very good with people posting 
there useful impressions, so I must admit I am nearly 100% leaning towards the Chord Mojo.  

 

[Rob Watts]

The ten hours applies if Mojo has been in long term storage and the battery is completely flat. So it won't apply now as units are only a few weeks old.
 
If the white light goes off, it is not charging. But the FPGA is still drawing current when charging and Mojo is off.
 
Rob

 

[M-13]

I have a Mojo, AK380 and AK380 Amp so can provide some early feedback.

Thanks for the response.
 
Have you tried the Mojo with the optical line out of the AK380?
 
I ask because I'm guessing the Mojo sounds better when fed by a AK Dap rather than an iPhone.

 

[J4MES]

I just signed up for Tidal and was testing it out via MBP's USB - Micro USB Mojo. In the mojo manual it says that the power ball light indicates the sample rate with a table below. Only problem is I see no table. When I tested Tidal/Spotify/iTunes the ball had a pale blue colour on all.

 

[Duncan]

The table is on the outside edge of the inner portion of the box