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Vision Pro Battery & Power - Questions and Discussion (MERGED)
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A 16” MacBook Pro is 8700 mAh, it’s Watt Hours that’s going to be the real interesting thing to find out. I haven’t seen that from anyone yet
If the battery lasts for 2 hours and is rated at 3166mAh, then the AVP draws 3166/2 = 1583 mA. If one wants to extend the life by another 2 hours, then one would need a power bank which can supply 3166mAh.
Dr EE, why is it not necessary to factor in the voltage or wattage?
I don't think this is quite right. Somehow I think there are some differences in all of these calculations. Someone else said it would need to be about 20,000 mAh. But hoping we can get that straightened out.
In one of the review videos, the reviewer said that the battery was marked 3166mAh.
IF that's true without any caveats, then we're saying a 27,000 mAh power bank would run the AVP for 8.5 hours?
Well, smart student. The answer is to make sure that the Watt rating of your charger is rated at or above the power draw of the battery.
There is a commenter on Marques' video that states that you can't take the 3166 mAh at face value. He says you have to know the voltage. He points out that the AVP battery is notably heavier than a smartphone with 5000 mAh. I don't claim to understand any of this. So, any clarity helps.
So, ignore the marking on the battery that says 3166mAh and go by the "notably heavier" weight. So, it's actually greater than 5000mAh. Doesn't seem to make sense to me. But what the hey. It is what it is. One reviewer said he got just over 3 hours of life out of it watching Endgame. He had a few minutes left on the battery. We can argue about this all we want, but we'll see what it is shortly. I don't know how long the battery lasts. There are a range of numbers.
Right. I'm hoping to order a Power Bank tonight to pick up when I fly into Miami and then immediately return to Guatemala. Just want to know what I'm ordering before I order it.
I'm not arguing with you, just trying to be clear for my own purposes.
mAh tells us nothing without knowing the voltage. Nobody uses mAh except for marketing purposes.
To know the energy capacity, Whr is the only relevant measurement. That's why Apple reports Whr in safety reports and most credible battery bank manufacturers also use Whr.
![1706649651181.png]( "1706649651181.png")
![1706649598270.png]( "1706649598270.png")
To know the energy capacity, Whr is the only relevant measurement. That's why Apple reports Whr in safety reports and most credible battery bank manufacturers also use Whr.
Agreed. But the original discussion was mAh. I was going with that. And using that to figure out what power bank to get to extend the time on the AVP. The charger provided is 30W. And Apple says that it can be plugged into to extend the time. So, why don't you recommend a power bank giving your information.
Mi 50W Power Bank 20000 - Xiaomi Global Official
Mi 50W Power Bank 20000 mAh can charge smartphones, tablets and the Nintendo Switch simultaneously,Equipped with 50W MAX flash charge,74 Wh high power,high-quality lithium-ion battery.
Xiaomi MI 50W Power Bank 2000, 20000mah, USB-C Input/Output Plus 2 USB-A Output, Charge 3 Devices Simultaneously, Output Upto 50W, Black
Xiaomi MI 50W Power Bank 2000, 20000mah, USB-C Input/Output Plus 2 USB-A Output, Charge 3 Devices Simultaneously, Output Upto 50W, Black
www.amazon.com
Have you been able to learn what wattage the AVP will take on input? A 50W power bank is fine?Mi 50W Power Bank 20000 - Xiaomi Global Official
Mi 50W Power Bank 20000 mAh can charge smartphones, tablets and the Nintendo Switch simultaneously,Equipped with 50W MAX flash charge,74 Wh high power,high-quality lithium-ion battery.www.mi.com
Xiaomi MI 50W Power Bank 2000, 20000mah, USB-C Input/Output Plus 2 USB-A Output, Charge 3 Devices Simultaneously, Output Upto 50W, Black
Xiaomi MI 50W Power Bank 2000, 20000mah, USB-C Input/Output Plus 2 USB-A Output, Charge 3 Devices Simultaneously, Output Upto 50W, Blackwww.amazon.com
Yeah I've been watching this too. Reason we were off on the 20,000 is they're not running it at 3.7v like most powerbanks are and we all assumed they'd be based on what the battery looks like (power banks are equipped with voltage boosters to hit higher voltages at the expense of efficiency). AVP's battery is more likely 7.6 or 11.4v by putting 2-3 cells in series.
The MacBook Pro 16" battery is 8700mah at 11.4v, I would bet AVP is a 7.4v 3166 mah pack (2 cells in series).
So this doesn't mean a 20,000mah power bank gives you 6 full charges (and the same reason your 8700mah 16" MBP get barely one charge out of a 20,000mah power bank). You'll lose efficiency as it multiplies its voltage to meet the electrical needs of the AVP. How much I'm not sure, but I'd say it's fair to say a 20,000mah pack should give 2-3 more hours still... I think. Possibly more. Reviewers like Gruber are saying they're regular getting over 3 hours on a charge without any help.
Uh, that Macbook battery has a capacity of 8700mAh * 11.4V ==> 99.18Wh. That "20,000mAh" USB battery will likely use a voltage of 3.6V-3.7V (Anker batteries seem to use 3.6V), and so its capacity will be around 72Wh. Even ignoring electrical efficiency losses (as you say, these do exist), a 72Wh battery shouldn't give you even 75% of a charge for that Macbook.
Battery capacity in Wh (Watt-hours) is the real comparison metric, but this is typically written in very fine and hard-to-read print on both Macbook and USB batteries. And Amazon listings rarely list Wh numbers, only potentially-misleading and confusing mAh ones.
While you could certainly be right about the AVP using 2 cells in series, the shape of the pack suggests at least 3 cells. Of course, it could also just be a couple of big polymer lithium packs.
The mAh is the total amount of energy stored in the battery. 3166 mAh is at the small end of phone batteries these days, and presumably the AVP draws more power than a phone, so it uses energy at a faster rate. The AVP lasts 2 hours with that battery while a phone with that size battery lasts 8 hours screen on time.
It’s frankly a shockingly small battery capacity for this thing.
Yes, just look at the output voltages on the Apple 30W adapter.
This Mi 50W/74Whr bank will output equal to or higher than the 30W at all USB-PD voltages.
Do we know yet if the AVP can charge faster than the 30W adapter they're including? Like if I buy Apple's 70W adapter, will it charge the AVP battery faster?
It's not "total energy." Common mistake. That's the whole of point of the posts on this page. Nobody uses mAh.
mAh only measures current. Same reason why nobody asks how many mAh is their Tesla or BYD.
Total energy is only measured using Whr.