HP 32SII success and woes

[Katie Wasserman]

(02-20-2015 01:50 AM)Sanjeev Visvanatha Wrote:  OK, the capacitor seems bad based on some resistance checks I made with an analog ohm meter. I get a small constant resistance when the positive lead is on the right of the capacitor and an infinite resistance when the leads are reversed.

Now, the 10B capacitor also behaves in exactly the same way. So, I think there is still a problem internally within the SoC.

I don't have a lab power supply. I can try to see if I can borrow one just to see at what voltage it starts to misbehave.

It's not uncommon for chips to stop working at voltages near the limit of their design. I suggest you use all 3 cells in series but install a series silicon diode to drop the voltage by about .6 volts. That will net you about 3.9 volts and keep the low battery indicator from turning on and the cells tight in the battery compartment. The low battery indication is set to about 3.5 volts in the 32sii.