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+--- Thread: Battery drain in an HP-4CV (/thread-21883.html)
Battery drain in an HP-4CV - Namir - 06-13-2024 09:05 AM
Waht would drain the atteries (say in 4 hours) on an HP-41CV??
Namir
RE: Battery drain in an HP-4CV - Raymond Del Tondo - 06-13-2024 11:16 AM
(06-13-2024 09:05 AM)Namir Wrote: Waht would drain the atteries (say in 4 hours) on an HP-41CV??Many things come into mind:
First: Current leakage somewhere.
Maybe between the zebra strips and CPU-board, or the I/O block and the kbd pcb,
a defective LCD module solder path, or even a defective CPU board.
RE: Battery drain in an HP-4CV - aurelio - 06-13-2024 11:36 AM
Hi Namir, I had such a problem many years ago with a bought calculator on TAS, and I remind that somebody, here, suggested it could be due to a defective capacitor; actually I never knew the cause 'cause I sent back the calculator. So I'm curious me too to know what could be the issue on your calculator.
RE: Battery drain in an HP-4CV - rprosperi - 06-13-2024 11:46 AM
(06-13-2024 09:05 AM)Namir Wrote: Waht would drain the atteries (say in 4 hours) on an HP-41CV??
Namir
Are you saying a brand new set of good quality (e.g. Energizer) N cells is depleted in 4 hours in a 41CV just sitting on the table? If so, it must get awfully warm, as that energy has to go somewhere. Or do you mean 4 hours of heavy execution time?
RE: Battery drain in an HP-4CV - Namir - 06-14-2024 12:25 AM
(06-13-2024 11:46 AM)rprosperi Wrote:(06-13-2024 09:05 AM)Namir Wrote: Waht would drain the atteries (say in 4 hours) on an HP-41CV??
Namir
Are you saying a brand new set of good quality (e.g. Energizer) N cells is depleted in 4 hours in a 41CV just sitting on the table? If so, it must get awfully warm, as that energy has to go somewhere. Or do you mean 4 hours of heavy execution time?
Not sure what the calculator user meant by 4 hours (whether of heavy use or not). He said he was testing his Stress module that he plugged in.
Namir