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December 2nd, 2017 14:00
PW7015MC compatible power supply
Hi, can anyone help please with advice on what the maximum rating is for power input to the PW7015MC Dell Power Companion (12,000 mAh)?
Is there a limit to which chargers I can use?
The label gives an input rating of 19.5V 2.3A, but I don't know if that's the maximum rating of the chargers that can be used, or whether that's the maximum it will draw, but more powerful chargers can be used.
For example, I have a LA130PM121 PA-4E charger with my WD15, this is nearly 3 times the wattage of my laptop charger at 130W 19.5V 6.7A. Is a 130W charger safe to use in the PW7015MC?
Or if can't plug the PA-4E directly into the power companion, can I safely power the PW7015MC from the WD15? Or should I only use the lower power laptop charger, which is just 45W?
It's more about convenience than anything else - using a charger that's already available as part of the docking solution rather than taking the laptop charger in out of my bag every time, as I'm sure one time I'll forget it...
jphughan
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December 2nd, 2017 17:00
In addition to the above, in terms of your question about charging from the WD15’s USB-C port, I don’t think the Power Companion can RECEIVE charge via USB-C. I know the spec allows power to flow in either direction, but that doesn’t mean every device has to allow it, so don’t be surprised if that doesn’t work. However, if you didn’t need to use the WD15 while charging the Power Companion, you could certainly unplug the AC adapter powering your WD15 and connect it straight to your Power Companion instead.
jphughan
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December 2nd, 2017 17:00
Any Dell AC charger is fine. The device receiving the charge controls the amount of power it draws (up to the limits of what the adapter can supply), so there’s no risk using a higher capacity charger. The charger can’t force a device to accept more power than it can handle. For example, I have a 130W AC adapter in my living room since that’s the most I need, but I also use it with some laptops that only require 35-60W and have been for years — no problem at all.