MobileRead Forums - View Single Post - Can some devices be powered directly from a wall outlet?

theducks · 01-18-2015, 10:11 AM

I am going to take your 'Mains Power' question Literally.

So the answer is none to very few.

My 1995 Toshiba CS series was the last Laptop I had that had a '100-240V' connection.

Mains voltages invoke an additional level of regulatory compliance. (CSA, UL, VDE...), that is why all those power bricks/wall worts are popular (besides the weight/space saving). The regulations pause at the low voltage connection.

USB (5V) chargers became more popular because of Electronic Waste reduction rules, by eliminating the need for proprietary chargers for common use items. (So why do many keep shipping chargers

. IMHO Kindle did it right. If you need a charger, buy the charger, otherwise just use the cord

Of all my devices, only my Garmin Nuvi will not function (as a GPS) normally with a USB cable connected to power.

01-18-2015, 10:11 AM	#6
theducks Well trained by Cats Posts: 31,137 Karma: 60406498 Join Date: Aug 2009 Location: The Central Coast of California Device: Kobo Libra2,Kobo Aura2v1, K4NT(Fixed: New Bat.), Galaxy Tab A	I am going to take your 'Mains Power' question Literally. So the answer is none to very few. My 1995 Toshiba CS series was the last Laptop I had that had a '100-240V' connection. Mains voltages invoke an additional level of regulatory compliance. (CSA, UL, VDE...), that is why all those power bricks/wall worts are popular (besides the weight/space saving). The regulations pause at the low voltage connection. USB (5V) chargers became more popular because of Electronic Waste reduction rules, by eliminating the need for proprietary chargers for common use items. (So why do many keep shipping chargers . IMHO Kindle did it right. If you need a charger, buy the charger, otherwise just use the cord Of all my devices, only my Garmin Nuvi will not function (as a GPS) normally with a USB cable connected to power.