[Rizonsik]

There was a seller in Taiwan on ebay.com that offered various grades of solder with that chip..his ones were real.
OPA1622 is supposed to be the nearest replacement for LME49990. Cheaper.

I found Taiwan seller. Thanks!

 

[DBaldock9]

Found a post in this thread, from 2017, that listed the contact email at iBasso for ordering a replacement PB-2 battery.
.
I contacted them, and the current price is USD$25 + $10 Shipping/Handling.
.
So, now I've got one on order.

 

[Rizonsik]

When I wanted to put 4 batteries (14.8v) in, something went wrong. And now pb2 does not work on batteries I Think add more batteries, up to 6 (22.2v) and use as an external source

 

[paulybatz]

Just pulled my P4 out after a long while...think the battery is shot. Haven’t tried the PB2 yet

have these been upgraded much
Saw there was a PB3???

 

[DBaldock9]

Found a post in this thread, from 2017, that listed the contact email at iBasso for ordering a replacement PB-2 battery.
.
I contacted them, and the current price is USD$25 + $10 Shipping/Handling.
.
So, now I've got one on order.

The replacement battery arrived today.
It's definitely flatter, and not swelled up in the middle, like the original battery - although the heat shrink / plastic that's wrapped around it, does seem to make it a little bit longer.
I'm trying to get the wires routed low around the end, so they don't get pinched when the top is installed.

 

[paulybatz]

Hmmm. How much was it??

 

[DBaldock9]

Hmmm. How much was it??

In my quoted post, I list the price of the battety.
USD$25 + $10 Shipping/Handling

 

[paulybatz]

Oh...lol. I see it now.
I think that’s a bit pricey for the battery

 

[DBaldock9]

It is more expensive than standard 3.7V Li-Ion batteries - but it is a proprietary size / voltage.
The DC supply is 16V, so the battery is probably something like 12 - 14V.

 

[XanderL]

I have recently acquired an Opus#1 and would like to use it with the PB2. The balanced output on the Opus#1 is a 2.5mm TRRS with no ground. How do I hook this up to the PB2 balanced input, would I just leave the ground disconnected?

 

[DBaldock9]

I have recently acquired an Opus#1 and would like to use it with the PB2. The balanced output on the Opus#1 is a 2.5mm TRRS with no ground. How do I hook this up to the PB2 balanced input, would I just leave the ground disconnected?

You may be able to gain access to GND from your Opus #1, by connecting the shield of your Balanced cable to the sleeve of the 3.5mm TRS jack.
Just don't connect anything to the Tip & Ring.
It will depend on whether the DAP detects plugs inserted into the jacks, and changes modes.

Your cable will need to be assembled like this:
.

Hirose 6-Pin Plug​	Pin 1​	Right GND​	3.5mm TRS Plug​	Sleeve​
Hirose 6-Pin Plug​	Pin 2​	R+​	2.5mm TRRS Plug​	Ring 1​
Hirose 6-Pin Plug​	Pin 3​	R-​	2.5mm TRRS Plug​	Tip​
Hirose 6-Pin Plug​	Pin 4​	Left GND​	3.5mm TRS Plug​	Sleeve​
Hirose 6-Pin Plug​	Pin 5​	L+​	2.5mm TRRS Plug​	Ring 2​
Hirose 6-Pin Plug​	Pin 6​	L-​	2.5mm TRRS Plug​	Sleeve​

 

[XanderL]

Thanks. I will give it a try. Isn't that similar to how A&K build their balanced to XLR cable? If I can't use the ground, because of mode switching, would it still work without the ground?

 

[DBaldock9]

Thanks. I will give it a try. Isn't that similar to how A&K build their balanced to XLR cable? If I can't use the ground, because of mode switching, would it still work without the ground?

It should work, but there may be issues with noise pick-up, without a grounded shield in the cable.

 

[paulybatz]

Y’all are making my brain hurt