Timeline for Charging a laptop though a USB-C power port with a low voltage/amperage
Current License: CC BY-SA 3.0
21 events
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| Feb 12, 2023 at 20:23 | answer | added | Steerpike | timeline score: 0 | |
| Jun 17, 2021 at 10:59 | answer | added | 9a3eedi | timeline score: 10 | |
| Jun 12, 2020 at 13:48 | history | edited | CommunityBot |
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| Dec 5, 2019 at 23:28 | answer | added | David Jashi | timeline score: 0 | |
| Aug 2, 2019 at 2:18 | comment | added | fixer1234 | "Your MacBook will charge from USB-C power adapters not manufactured by Apple if they adhere to the USB Power Delivery specification." This suggests that it isn't simply the PD protocol. PD's purpose is to support power levels above what the USB spec provides. So I suspect that any source must not only comply with the protocol, but offer at least the lowest PD power mode. A bottle of fireflies in front of a solar panel probably wouldn't charge the battery even given infinite time (or until the fireflies died, whichever came first). | |
| Jan 22, 2018 at 4:11 | answer | added | Rykel | timeline score: -4 | |
| Jul 14, 2016 at 0:09 | answer | added | Ivan Anishchuk | timeline score: 0 | |
| Nov 30, 2015 at 9:36 | audit | Suggested edits | |||
| Nov 30, 2015 at 11:13 | |||||
| Nov 23, 2015 at 17:36 | answer | added | Gary Law | timeline score: 1 | |
| Nov 12, 2015 at 10:31 | comment | added | Psycogeek | also curcuit dependant, "brown" power or brownout power is often far worse than complete power losses. If there is a switching charging curcuit in there that you feeding with what was supposed to be a constant power source, the solar is anything but constant. Depending on the curcuits (completely depending) sending it power that is not enough amperage that the voltage takes a dive (on load) you could damage any switching curcuits used in there to charge or control. Where a mosfets are not fully switched, they no longer are power handling the same :-) Brown power really bad. | |
| Nov 12, 2015 at 10:22 | comment | added | Psycogeek | then your all set with a power input., The other part is about solar not being a constant power source, , how does your device handle being unplugged and plugged (powered and unpowered)? solar can be a more or less stable voltage, but the amperage varies highly on asmith aim and via shadows, clouds etc. . Many of the solar kits they have have battery also, the ones that do not notice the comments about comming back to a fully discharged device :-) like my cell phone turns itself on every plug and unplug, plus everytime the power drops to a set levels (like 15% default) | |
| Nov 12, 2015 at 9:20 | history | edited | David Mulder | CC BY-SA 3.0 |
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| Nov 12, 2015 at 9:15 | comment | added | David Mulder | @Psycogeek I don't know whether you realize, but I was talking about a USB-C power port. For example the new Macbook has a single USB-C port that's used both for peripherals and for charging itself. I already presumed that the best approach would be to keep the device off and charge the battery slowly. Either way, a lot of your comments seems a bit... hard to understand, as solar panels for smartphones are quite common. | |
| Nov 12, 2015 at 4:40 | comment | added | Fiasco Labs | Unless your computer manufacturer intended for the laptop to be chargeable through a USB port, no. What does their literature say? | |
| Nov 12, 2015 at 2:28 | comment | added | Psycogeek | if you wanted to charge a device with solar, you do so (sort of) by replacing what was charging it before , and it presents some unexpected results without a charge buffer (battery) when the devices are not usually designed for sporatic power, and wake up. A laptop potentially a person could feed solar with a controller (some sort of control) right into the battery connects, use the battery as the buffere store, or via the normal power source, probably needing a battery buffer for better regulation and constant power. | |
| Nov 12, 2015 at 2:25 | comment | added | Psycogeek | i do not see any reason to believe that USB-C connection would differe that greatly from the other USB, if it is not a direct port for power-in like charging a phone/tablet/gps is. There would be a curcuit to deliver power (even higher currents) to a usb device, but not the other way around. en.wikipedia.org/wiki/USB-C Unless designed for the purpose of charging the device. Not only would a standard desktop or laptops motherboard configurations not be set up to work that way, but you could possibly damage curcuits there, as solar charging would have to have an higher votlage. | |
| Nov 12, 2015 at 1:47 | comment | added | David Mulder | @Ramhound: I was expecting the USB spec to say something about what such circuits should accept~ am I correct to understand your comment as an answer that it does not and that there is no de facto standard either? | |
| Nov 12, 2015 at 1:41 | comment | added | Ramhound | Depends entirely on the charging circuit really only one way to determine that | |
| Nov 12, 2015 at 1:37 | review | Close votes | |||
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| Nov 12, 2015 at 1:27 | review | First posts | |||
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| Nov 12, 2015 at 1:17 | history | asked | David Mulder | CC BY-SA 3.0 |