USB powered "fake" battery pack adapter?

[ijabbott]

(04-15-2018 08:13 PM)pier4r Wrote:  

(04-15-2018 06:05 PM)ijabbott Wrote:  Okay, it seems to work on some older models, but it doesn't work on my fx-CG50. With the batteries removed, and with the calculator plugged into a USB charger, the calculator turns on for a second when the 'ON' button is pressed (just the backlight with a blank screen apart from the 'busy' annunciator in the top right corner), and then turns itself off again.

I'd make a youtube video but I can't be arsed!

Hmm. Are you sure are on the last OS? On the 9860G the USB allowed only connection and no operation without batteries until I upgraded.

I'm on OS 3.11, which is very similar to OS 3.10 with just some minor changes for the IB exams.

Quote:Are you sure the cg10, 20, 50 don't behave like the 9860? Would be heavily suspicious as they are new models that compete with prime and nspire CX that can "survive" on USB power. Let me check.

I don't own the older cg20 or cg10 Prizm calculators (which I think are just regional variants of the same calculator) so I don't know. Most of the electronics from the CG10/20 seems to have been retained in the CG50, apart from a faster processor in the CG50.