So, I got way into this and was totally about to over engineer a solution. While it would be bad ass to build my own power bank for a portable raspberry pi, there is a cheaper, easier, and quite likely safer alternative that's actually super common and easy to find. Qualcomm's Quick Charge specification is compatible with USB PD, but Quick Charge power banks won't advertise themselves as 5v 5a chargers, because they're not necessarily. They more frequently advertise a wattage that their ports are capable of supplying, because a Quick Charge capable device charging on a Quick Charge capable charger won't pull their maximum amperage through the whole charging cycle, instead communicating with the charger and requesting different amperages throughout the charging cycle at a consistent 5v. Which is why it's easier for them to advertise capability with a single wattage rating as opposed to explaining all of that.
Because Quick Charge is compatible with USB PD, any Quick Charge charger should respond to the Raspberry Pi 5 by delivering 5v 5a consistently as long as they have a port capable of delivering at least 25v. Same would be true for Quick Charge compatible power banks. The one in this link is capable of delivering 30w from it's USB C port and has a 40ah capacity. It's actually a pretty bad ass lil power bank.
https://www.amazon.com/dp/B0C2423BW9?re ... title&th=1
To be transparent I haven't yet made the box for my pi 5 yet, waiting till I can get the AI hat, NVMe hat, a good ssd, and a thermal solution I like. SO I haven't actually used this power bank in practice with the Pi yet, but I've used it a bunch so far with my phones. Important note, it really matters what brick you try and charge it with. 40ah is a lot of capacity and a 1 amp charger will seem like it's doing nothing to charge this. At one point I thought the power bank might be a dud because I'd left it to charge for 12 hours and it wasn't even half full. Took me longer than I'd like to admit to realize my mistake, lol.
But in theory this bank should be a great solution and you could even keep a second one on hand, and swap it out in whatever chasis you end up using. I plan to have a mounting point in mine for the bank with a little window so you can check it's charge state, some cables running to the Pi and a usb hub, and a panel mount USB C plug for charging, so I can strap this baby in and won't have to take it out again, unless I want to.
I'm sorry people get so snippy in these forums. I'll never understand why so many people complain about engaging on a forum, like that's the point of a forum. I mean some people's question's are obvious, but every time you leave the answer you increase the likelihood someone will see it in the future before dropping a post. Anyway, I think it's a very valid question and I'd be fascinated to see your prototype when it's further along
P.S. Oh, also, I highly doubt a TSA agent is going to ask you what the voltage and ah of your portable power bank are, unless it's like cinder block sized. Happy building!!!
Because Quick Charge is compatible with USB PD, any Quick Charge charger should respond to the Raspberry Pi 5 by delivering 5v 5a consistently as long as they have a port capable of delivering at least 25v. Same would be true for Quick Charge compatible power banks. The one in this link is capable of delivering 30w from it's USB C port and has a 40ah capacity. It's actually a pretty bad ass lil power bank.
https://www.amazon.com/dp/B0C2423BW9?re ... title&th=1
To be transparent I haven't yet made the box for my pi 5 yet, waiting till I can get the AI hat, NVMe hat, a good ssd, and a thermal solution I like. SO I haven't actually used this power bank in practice with the Pi yet, but I've used it a bunch so far with my phones. Important note, it really matters what brick you try and charge it with. 40ah is a lot of capacity and a 1 amp charger will seem like it's doing nothing to charge this. At one point I thought the power bank might be a dud because I'd left it to charge for 12 hours and it wasn't even half full. Took me longer than I'd like to admit to realize my mistake, lol.
But in theory this bank should be a great solution and you could even keep a second one on hand, and swap it out in whatever chasis you end up using. I plan to have a mounting point in mine for the bank with a little window so you can check it's charge state, some cables running to the Pi and a usb hub, and a panel mount USB C plug for charging, so I can strap this baby in and won't have to take it out again, unless I want to.
I'm sorry people get so snippy in these forums. I'll never understand why so many people complain about engaging on a forum, like that's the point of a forum. I mean some people's question's are obvious, but every time you leave the answer you increase the likelihood someone will see it in the future before dropping a post. Anyway, I think it's a very valid question and I'd be fascinated to see your prototype when it's further along
P.S. Oh, also, I highly doubt a TSA agent is going to ask you what the voltage and ah of your portable power bank are, unless it's like cinder block sized. Happy building!!!
Statistics: Posted by maravelous77 — Fri Sep 27, 2024 2:33 am