What could they have used instead, given the constraint of wanting a cord that locks securely on both ends?
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Vision Pro Battery & Power - Questions and Discussion (MERGED)
- Thread starter fs454
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Now that we have some AVP's in the wild...could someone please plug in a power bank in series and just confirm that it works?
Yessss. Also, can anyone test if vision pro’s battery can work as a powerbank, for your iPhone via the usbc input port.
With all the discussion about battery life, ad nauseum, I’m baffled that I can’t find anyone who has tried a power bank. 
Not sure how charged the AVP battery comes out of the box but plugged mine into my Anker power bank and is charging just fine. It's drawing around 30W from it.
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I ask the gent at the Apple Store if the power bank could be plugged into the battery while using the AVP. He said the power bank could change the battery. He recommended not plugging in the power bank until the battery got down to 20%.With all the discussion about battery life, ad nauseum, I’m baffled that I can’t find anyone who has tried a power bank.
For safety reasons, batteries are shipped at a "low" charge, and so it's probably shipped in the 20-50% charge range. Whatever your charge level was, it's nice to confirm that the AVP battery uses 30W.
My AVP battery went down to 20%, so I pugged it into an Anker Power Bank with the capability of outputting 140W. The display on the Anker went to around 49 watts.
Was the AVP in use at the time? I wonder if the extra ~19W went to the AVP instead of the battery.
Just because a battery can output 30W doesn't mean the rate at which it can be charged is limited to 30W (or alternatively, just because Apple provide a 30W charger doesn't mean the battery is limited to that wattage input when charging). The Anker power bank is probably just charging the Vision Pro's battery charger faster than were you to plug it into the wall socket.
Here's a photo of the AVP battery at roughly 57% being charged by a USB-C PD power bank with a maximum output of 65W (I am not endorsing this power bank! It just happened to be within reach).
The glare makes it a bit hard to read, but it says 19.5V @19.2A. 1.92A (sorry for earlier error)
It definitely supports the 20V USB-C PD spec, and it seems there's a lower bound for the maximum charge rate at 40W.
![avp-battery.jpg]( "avp-battery.jpg")
The glare makes it a bit hard to read, but it says 19.5V @
It definitely supports the 20V USB-C PD spec, and it seems there's a lower bound for the maximum charge rate at 40W.
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Was the battery connected to the AVP? Any power measurements need to be done while the battery is disconnected, otherwise you have some unknown amount of power also going to the AVP.
19.5V at 19.2A can’t be right. That’s 374W — the battery would probably be burning up ….
While that’s true, the numbers are misleading if the battery is connected to the headset. if it is connected, we don’t know how much went to the battery and how much went to the AVP. We only know that the total was 49W (and I did make a bad assumption that the battery was using 30W).
No it wasn't connected to the AVP.
Sorry yes you're right, my bad. I was lazy doing the math, it's 1.92 A.
There's a lot of sophisticated, high-end technology going on with the AVP battery solution. It's under-the-hood so you can't really appreciate it.
Have you ever heard of Wh?
Really, before opening a thread like this do your research, it's ridiculous.
mAH is a unit of charge. It is not a unit of energy.
Please stop using it as a unit of energy, 1AH across devices is not equivalent in terms of energy storage. This is high school physics, it’s incredibly annoying how many people have been duped by marketing to think m(AH) is an accurate way to measure battery capacity.
I think it’s also important to note that the external battery is not just a “power bank”. I had that impression as well until I looked at the connector - it’s very specific to the AVP and as @attohs mentioned above, it may actually have variable voltage rails.
Having said that, I would recommend no one buy an external AVP battery. It’s completely unnecessary - you can charge the battery with an external power bank while using the AVP, and I think that is the intended mode of operation. Any 30W+ power bank on the market can be used to supplement the external battery.
Having said that, I would recommend no one buy an external AVP battery. It’s completely unnecessary - you can charge the battery with an external power bank while using the AVP, and I think that is the intended mode of operation. Any 30W+ power bank on the market can be used to supplement the external battery.
You're not wrong with the outrageous pricing. If anything, you're being charitable as you can get "30,000mAh" (114Wh) USB batteries for around $60 or less, not $100.
However, the AVP battery is a 35.9Wh 3166mAh battery, and so you can no longer compare mAh with mAh. In order to do that, the voltages need to be the same (as in your typical car battery), but they're not. Calculating the AVP cell battery voltage: 35.9Wh / 3.166Ah --> 11.34V. Anker often uses 3.6V, and 3.6V is a far cry from 11.34V. So, you really have to compare the "Wh" (Watt-hour) ratings (printed in nigh-unreadable print on the battery), which is what really should have been used all along as mAh is problematic (as in this case).
So, $200 Apple battery rated at 35.9Wh, compared to a ~$60 114Wh battery.
The prices are ridiculous. I wasn’t happy they had the audacity to charge $200 for a case.
Nevertheless, the main point of the discussion is that it is not a 3000mAH power bank - don’t buy it because it is. It’s specifically meant to act as a power unit to the AVP. I’m not saying it isn’t overpriced, but it shouldn’t be represented as just a power bank.
I reiterate my previous recommendation - don’t get another external battery if you want to use the AVP for longer than the stated runtime - just get another power bank and connect it to the external battery.
Nevertheless, the main point of the discussion is that it is not a 3000mAH power bank - don’t buy it because it is. It’s specifically meant to act as a power unit to the AVP. I’m not saying it isn’t overpriced, but it shouldn’t be represented as just a power bank.
I reiterate my previous recommendation - don’t get another external battery if you want to use the AVP for longer than the stated runtime - just get another power bank and connect it to the external battery.