- I’d buy a Powercore which only did USB PD
- I’d only really want a hybrid USB PD and Type A
So Anker generously sent me their Anker Powercore 20000 PD Essential for Xmas, and I already owned a 10000 PD and 10000 PD Slim.
I have owned a 26800 for > 3 years.
I keep care of my Powercore by:
- storing at room temperature
- use them each every few months
I only relatively recently got a 18W input tablet, having owned 5V input only before and began to notice a strange issue that my number of tablet recharges were less at 18W than 10W.
So I went back to school on electronics and found out why.
Electronics for portable chargers are tuned to run most efficiently at a particular voltage. When Anker only made 5V output, it was easy to tune for that, but along with Power Delivery you get 5V 9V 15V 20V
The electronics in a Power Delivery give different efficiencies at different voltages.
In this case when you use this Powercore at 45W, you get 90% efficiency vs at 18W you get 95% efficiency.
Now if it is less efficient then the heat ages the cells faster, so here at 18 months see the drop…
So that got me thinking…
If you bought a PD Portable charger with higher Wattage, you’d get the most energy output if it were tuned for higher Voltage, so it would necessarily be less efficient at lower Voltages.
So would you buy a Powercore which only supported higher voltages? Or, knowing it worked best at higher voltages? You’d get more value-for-money.