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Charging HP Prime G2
07-07-2021, 09:34 PM
Post: #1
Charging HP Prime G2
Does a G2 HP Prime definitely charge fine while turned off and plugged in?

I'm pretty sure that I have left mines on all night, while turned off, on the USB wall charger I have, and found that the lightning bolt was still there when I plugged it into a PC and left it on the next day. Whereas when I leave it charging and turned on, on the same PC, after a certain period (much less than 8 hours (which is all night)), the lightning bolt will disappear and show that it is fully charged.

After the full charge while turned on, the bolt will not appear until it has run down a bit since that full charge, or been used without plugging in.

Has anyone else experienced anything similar? This started when I was only charging with the device turned off, which I assumed would charge faster, and given that I use the calculator for a lot of the day, I thought this would be better. I only noticed there may be something awry, when the calculator was struggling to last even one day, whereas, now when I charge with the device trned on, it doesn't drop below the initial 25% in one day, and remains to appear to have 100% charge.
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07-08-2021, 04:06 PM
Post: #2
RE: Charging HP Prime G2
I kinda noticed some anomalies when charging the g2. After charging all night and turned on the lightning bolt was still on and when unpluged it was a 100%. Other times after charging for awhile when i un plugged it would show 100% but then would then drop to 75% and other times even down to 50%. But the battery life seems good though
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07-08-2021, 06:43 PM
Post: #3
RE: Charging HP Prime G2
see also:

https://www.hpmuseum.org/forum/thread-11...#pid106529

https://www.hpmuseum.org/forum/thread-13...#pid123256

Cambridge, UK
41CL/DM41X 12/15C/16C DM15/16 71B 17B/BII/bII+ 28S 42S/DM42 32SII 48GX 50g 35s 30b/WP34S Prime G2
& Casios, Rockwell 18R :)
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07-28-2021, 02:15 PM
Post: #4
RE: Charging HP Prime G2
(07-08-2021 04:06 PM)Dougggg Wrote:  I kinda noticed some anomalies when charging the g2. After charging all night and turned on the lightning bolt was still on and when unpluged it was a 100%. Other times after charging for awhile when i un plugged it would show 100% but then would then drop to 75% and other times even down to 50%. But the battery life seems good though

The exactly same problem here.

At first I thought it was a battery problem, but when I got a new battery, it was the same problem. I used the original charger with 5V1A + the original microusb cable, charging overnight, and after unplugging, the power on instantly showed 100%, then after a few seconds it became 75%, and sometimes even became 50%. But actually the rest of the calculator works fine.

Maybe there is a problem with the calculation of the battery voltage, I don't care about that anymore.
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10-02-2021, 07:22 PM
Post: #5
RE: Charging HP Prime G2
Hello.
That also happens to me with my new HP Prime G2: I left it charging for 4 hours in off mode and then when I turned it on, the indicator kept reading 75%.
My other HP Prime V2 doesn't have that problem.
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