[Benesyed]

I have the Arya V2. I need to max out the high gain on my Jap 1AM2,but it still feels a bit thin. The stealth versions are a bit more efficient but i don't think it would be a good pairing due to low power of the Walkman.

interesting, and this is balanced? I guess it's not that surprising given the Sony power limit

 

[Sonywalkmanuser]

ZMI powerbank seems to be very low noise:
https://goughlui.com/2021/06/14/tes...echargeable-li-ion-portable-power-bank-qb810/

Another powerbank noise for reference:
https://goughlui.com/2021/09/01/review-teardown-blitzwolf-bw-p12-10000mah-2xusb-ausb-c-power-bank/

Seems like authentic Xiaomi is also very low noise:
https://goughlui.com/2017/11/19/review-teardown-mi-power-bank-pro-10000mah-qc3-0-plm03zm/

 

[touzeen]

interesting, and this is balanced? I guess it's not that surprising given the Sony power limit

Yes,on Balanced. I usually use the Aryas with a Drop 789 and Cayin HA1A Tube Amp. They need a lot of power to sound their best.

 

[Sonywalkmanuser]

I have spend quite some time reading up on power banks and usb wall chargers.

So here are my findings, which is focused on providing clean(low electrical noise/ripple) charging to the Walkman.

Not all Ankers products are great:
https://goughlui.com/2023/01/15/review-tested-anker-powerport-iii-65w-pod-usb-c-wall-charger-a2712/

Some of these "100w" chargers have problems with heat and can't sustain 100w for long term, also using non-recognized capacitors:
https://goughlui.com/2021/10/17/rev...uperport-4-100w-desktop-charger-with-dual-pd/

Not all generic brand power banks are bad, they can be very low noise:
https://goughlui.com/2022/09/22/review-iniu-bi-b63-usb-c-pd-65w-25000mah-92-5wh-power-bank/

Premium priced stuff can be bad too:
https://goughlui.com/2022/01/04/review-cygnett-chargeup-go-5000mah-power-bank-cy3533pbche/

Something like a older Xiaomi powerbank pro is very low noise:
https://goughlui.com/2017/11/19/review-teardown-mi-power-bank-pro-10000mah-qc3-0-plm03zm/

 

[Benesyed]

that Anker charger looks pretty good there haha. not perfect but likely more than good enough for Walkman to charge without causing damage

 

[Sonywalkmanuser]

that Anker charger looks pretty good there haha. not perfect but likely more than good enough for Walkman to charge without causing damage

Yes it’s within specifications but as the author point out, there are other more budget brands that offers lower ripple. This premium Anker is nearer to the max allowable standards set by usb if. Also the higher the ripple, the more excess heat is generated and more stress to the internal components of the charge receiver.

see page 16 of the pdf for acceptable voltage range:
https://training.ti.com/sites/default/files/docs/Design Considerations for USB type C Power Delivery.pdf

https://www.componentsbureau.com/la...hat-is-voltage-ripple-and-why-is-it-important

 

[Sajid Amit]

Hello Friends,

New owner of the WM1ZM2 here.

Quick question:

Should I turn off battery manager to squeeze out more listening time after a charge? Isn’t the idea of a battery manager to help prolong the battery life?

I am writing this in some haste but would appreciate people’s thoughts.

 

[The1Signature]

Hello Friends,

New owner of the WM1ZM2 here.

Quick question:

Should I turn off battery manager to squeeze out more listening time after a charge? Isn’t the idea of a battery manager to help prolong the battery life?

I am writing this in some haste but would appreciate people’s thoughts.

As others suggest it, too, leave it activated. However, when you travel and you won't be able the charge the next days, keep it off.

 

[kumar402]

Hello Friends,

New owner of the WM1ZM2 here.

Quick question:

Should I turn off battery manager to squeeze out more listening time after a charge? Isn’t the idea of a battery manager to help prolong the battery life?

I am writing this in some haste but would appreciate people’s thoughts.

No experience with 1Z but battery manager will help you in long term by not letting you strain your battery on a daily basis. May be it will ask you to charge when battery goes 20% and then only charges till 80% of capacity.
So it's like loosing a battle but winning a war kind of thing.

 

[The1Signature]

According to the Sony manual, one can charge the battery of the wm1am2 / wm1zm2 500 times in total.

 

[psikey]

According to the Sony manual, one can charge the battery of the wm1am2 / wm1zm2 500 times in total.

Though it will be much more than that with reducing capacity.

 

[FreeTime]

According to the Sony manual, one can charge the battery of the wm1am2 / wm1zm2 500 times in total.

Just speculations, though i cannot confirm it, i remember years ago i read it refer to 500 power cycle. 1 power cycle is like anything below 20% charging onwards or charging it to 100%. Thats's why battery care is there to avoid 1 cycle. Avoiding power cycle can be good but many will notice battery life reducing after months of usage, think because the calibration of the battery will be inaccurate after many avoidances of the power cycle.

I recently did 1 power cycle by draining it complete 0%, trying to boot until no screen light, then charge to 100 % again (battery care has to be off). It will recalibrate the battery by the android system. I believe many long time android user know this method. However, try at your own risk, hehe.

Honestly, no need to do this method i did unless u notice drastic reduction in playtime hours. Of course i might be wrong, just something i read over the years.

Many manufacturers even Tesla will tell owners to avoid going below 20%, but they did not fully explain why.

Little sharing, this is how i kept my 2 years old iphone 11 with battery health 93 %. And my 5 months old iphone 13 battery health still 100 %. Though the cable is an important factor too, that's why Sony stated to use only their cable. I have damaged few of my android phones batteries with slight faulty cable, i learned from there. I personally think any cable better than Sony cable is fine too, im using an Audioquest Forest cable. Try at your own risk too,

Really a faulty cable can kill a battery within 20 charges, i have experience this few times.

 

[kumar402]

Just speculations, though i cannot confirm it, i remember years ago i read it refer to 500 power cycle. 1 power cycle is like anything below 20% charging onwards or charging it to 100%. Thats's why battery care is there to avoid 1 cycle. Avoiding power cycle can be good but many will notice battery life reducing after months of usage, think because the calibration of the battery will be inaccurate after many avoidances of the power cycle.

I recently did 1 power cycle by draining it complete 0%, trying to boot until no screen light, then charge to 100 % again (battery care has to be off). It will recalibrate the battery by the android system. I believe many long time android user know this method. However, try at your own risk, hehe.

Honestly, no need to do this method i did unless u notice drastic reduction in playtime hours. Of course i might be wrong, just something i read over the years.

Many manufacturers even Tesla will tell owners to avoid going below 20%, but they did not fully explain why.

Little sharing, this is how i kept my 2 years old iphone 11 with battery health 93 %. And my 5 months old iphone 13 battery health still 100 %. Though the cable is an important factor too, that's why Sony stated to use only their cable. I have damaged few of my android phones batteries with slight faulty cable, i learned from there. I personally think any cable better than Sony cable is fine too, im using an Audioquest Forest cable. Try at your own risk too,

Really a faulty cable can kill a battery within 20 charges, i have experience this few times.

80-20 rule and good charger with good cable is all we need.

 

[Amber Rain]

This is normal behaviour for Lithium Ion batteries, 500 full charge cycles before the capacity starts depleting. So the best way to keep good capacity is not to let it go below 20% and not charge above 80%. That's what I do with my 1A and other DAPs.

 

[FreeTime]

Regarding Battery manager, i tried to google and can only find limited info about it, except it monitor battery temp, charging parentage, etc. Think it is better to leave it at default turn on, until someone can provide more specific details.