2 19VDC laptop chargers in series

[Ether]

Originally Posted by Ether

3) With both chargers plugged in, there is no measurable voltage between either output of Charger A and either output of Charger B.

Originally Posted by Matt Krass

Do you mean you didn't measure output voltage of any kind from either charger, or they both output the same measured voltage?

Neither.

What I intended to convey was this:

Chose either output wire (plus or minus) from Charger A, and chose either output wire (plus or minus) from Charger B. Then measure the voltage between the two chosen outputs. The voltage reading is zero regardless of choice.

It's an interesting grammar question. Had I intended to convey what you said, I'd have written this:

There is no measurable voltage between the outputs of Charger A or the outputs of Charger B.

I don't know if that's the correct grammar or not.

Anyway, the purpose of the test was to determine if there is a leakage path of some sort which might cause a problem when the outputs of the two chargers are wired in series.

Also, I am not what your friend's budget (if any) is, but perhaps I could recommend something like this?

http://www.digikey.com/product-detai...P5P-ND/2920448

Thanks for the link. I'm pretty sure his budget is "whatever I have laying around".