Why two power ports on a budget laptop??
#38
IMHO from purely technical perspective the best scenario would be:
1. run laptop off the AC adapter when it is connected, using excess power to charge the battery (or supplementing lacking power using battery, if AC adapter is not powerful enough) similar to other laptops, instead of running off battery only and using AC only to charge the battery, resulting in the 3A limit on the battery charging lead also imposing how much the machine can draw from AC adapter.
2. Support USB PD specification beyond 5V/3A - this would make USB-C charging useful enough to hold its own against barrel plug (unless said support is already there but is limited by the point #1).
3. Keep both ports - this adds versatility, making PBP into more of an "ultimate road warrior" machine - but allow people not to purchase the barrel plug AC adapter, especially if it's only 3A instead of at least 4.5A.

I imagine though this may make it more expensive, especially the USB PD support. I would be willing to pay the extra - I'm probably paying more in shipping costs anyway - but I'm not going to speak for everyone else.

P.S.: KC9UDX's quip about sticking wires into power jack reminded me when one time my 170W power brick for ThinkPad W510 failed and all I had to replace it was a 90W PSU intended for ThinkPad T6x series, with which my W510 throttled to a crawl. I ended up putting a piece of sticky tape over the contacts on the power connector on its motherboard, then over that tape inserting a staple to short-out two signal wires that are used to communicate the PSU power output and putting another piece of sticky type as a makeshift insulator. That fooled the machine into thinking it got a much more powerful PSU connected to it and allowed me to get the work done much faster. The 90W PSU did get hot, but since the work I was doing didn't need GPU the power draw was still within its limits. The reaction on the customer's faces was priceless when they saw me pulling out my multitool, popping the keyboard open and doing the whole hack in about 5 minutes.
This message was created with 100% recycled electrons


Messages In This Thread
RE: Why two power ports on a budget laptop?? - by moonwalkers - 08-10-2020, 11:19 AM

Possibly Related Threads…
Thread Author Replies Views Last Post
  PBP booting but stops at flashing power led jonasd 13 502 09-26-2022, 12:17 AM
Last Post: jonasd
  Increasing the maximum power draw dsimic 13 12,061 08-28-2022, 05:43 PM
Last Post: scurrvy2020
  Alternative Power supply options gallomimia 12 12,194 08-16-2022, 09:14 PM
Last Post: cypresstwist
  keyboard and usb ports not working slig 3 1,122 02-15-2022, 10:12 AM
Last Post: wdt
  Blinking red light for charger, no power-on bifo 11 7,760 11-30-2021, 01:37 PM
Last Post: wdt
  power on PBP if your keyboard is dead? stozi 0 695 11-29-2021, 01:55 PM
Last Post: stozi
  Motherboard malfunction - a possible warning about power supplies mjc 8 3,852 07-28-2021, 01:04 PM
Last Post: mjc
Question UK Power Supply Feakster 11 12,571 02-09-2021, 12:30 PM
Last Post: dieselnutjob
  Pinebook Pro Dock Power Requirements calinb 9 8,036 12-16-2020, 09:24 AM
Last Post: dsimic
  Auto-wake behavior when external power is connected diodelass 7 6,926 12-05-2020, 01:19 AM
Last Post: dsimic

Forum Jump:


Users browsing this thread: 3 Guest(s)