I finally got around to buying a (very) cheap USB tester. These are some very rough numbers of charging the Quest 3 and Quest 2 with different power sources.
The first one is very odd. My Quest 3 cooling fan came on the first time I tried the QWOS battery, and the tester said 12V this time (very short test). My Romoss battery has 12V capacity as does the 45W generic charger I tried, but they both negotiated 9V. Does anyone know if the Quest 3 will even negotiate for 12V PD? It certainly didn't on the Romoss or generic charger. I didn't attempt the QWOS headset battery on the Quest 2 because I decided not to risk it, but I did try using the QWOS to charge some the other batteries, and it did negotiate 5V in those cases, so it would probably be OK for the Quest 2. I just wish I knew why it was 12V on the Quest 3. Maybe the tester got confused? Or maybe QWOS doesn't support a 9V ouput so the Quest 3 jumped it to 12V? In any event after having the cooling fan come on in the initial testing, I've decided not to use that battery.
Also note that the "Saqico Battery Pack" will not physically attach to a Quest 3 without being "altered". I'm not recommending any of these batteries, just noting the the differences. Also, the voltages are significantly rounded. I had to use couplers with two cables in some cases, and I'm sure that the extra resistance dropped the voltage.
I'm not sure why the Quest 2 only drew 1 amp from all the wall chargers. Maybe it was getting close to full?
The best battery I tried is still the Romoss sense 8+, but its a brick, not a wearable battery. I wish someone made a wearable 9V capable battery for Quest 3.
Yeah I did a full power usage test for the Quest 3. It makes a big difference what the headset's doing at the time, even if it's downloading an update, the draw goes up a bit and of course what it's level of charge is makes a big difference. I did all my usage tests with the headset at 100% and the charge tests when it was at 60%. I think the headset refresh rate setting also makes a difference.
It will switch to 12V if your power brick has 12V. My PC has 12V PD on one of its USB-C sockets and it switched to 12V for that, unless it's nearing full charge, then it drops to a lower voltage. My battery packs and wall sockets don't do 12V so delivered at either 5, 9V or 15V. Interestingly my Quest Pro dock requires 15V but I don't have the Quest 3 dock so can't confirm what that uses.
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Thanks. I've looked at that many times. I was mainly interested in the batteries, but did do the wall chargers just because they were there. I looked any my 45W adapter will NOT do 12V. It just does 9V and 15V, so I missed that. The Romoss battery says it does do 12V, so not sure why it negotiated 9V with the headset.
Have you noticed the cooling fan come on when you charge with 12V?
