(06-06-2023, 04:42 AM)frtodd Wrote:(06-05-2023, 05:18 PM)AndyN Wrote: The quick start guide for the PineTab2 mentions only charging at 5v and 3 amps. I.e. not using a charger beyond 15W.
I took note of that, too. What it actually says:
Quote:The PineTab2 should be charged using a 15W (5V 3A) USB-PD power adapter. Charging at a higher voltage may result in damage to your device.
My interpretation:
You need 15 WATTS minimum to properly charge the device. That's reasonable. That's the power capacity of the charger.
Charging at higher VOLTAGE will damage it: 5V (the USB standard) is what's required.
I plugged it into my laptop dock with 85W PD: it works great. I left it on an Anker charging station overnight: that seemed fine, too. Some of the more puny device chargers you may have lying around may not produce enough power, though they will still be operating at the USB standard of 5V. Upping the voltage with some other random charger, though, would not be helpful.
Re-reading that statement as you posted is a little clearer. In my understanding the charger should restrict the voltage to what’s supported. Your 85W charger would support 20v, but would be choosing not too.
I’m guessing the wording might be accounting for some poorly implemented chargers that might dump higher voltages by default. Make sure you trust your charger if it’s more than 15W basically.
I had a look at the schematic and if I’ve understood correctly, the capacitors across the usb port are only spec’d to 10v which if implemented on the board means higher voltages will not be supported.
I charged off a regular USB charger and it stayed around 1.4 amps at 5v.it did charge, slowly.