50g Backup Battery

[franz.b]

(11-06-2024 01:32 PM)rprosperi Wrote:  

(11-05-2024 11:30 PM)franz.b Wrote:  I don't understand. I have several 50g units but every time one of them runs out of batteries the risk of total memory loss during battery change is very high, about 1 time out of 2. If the batteries are low enough to not allow the calculator to be turned on then it is almost certain that the memory will be lost, even if the battery is discharged for only a few days. I wonder what purpose this backup battery has if it cannot withstand even a short interruption of power. I think it might be safer to change the batteries while powering the calculator with a USB cable.
I use LSD rechargeable batteries such as Eneloop and other brands.

Thanks

Most likely, your backup battery is simply low or dead. I have changed batteries in 50g's for years without ever losing memory, most recently just 2 days ago. Of course this can depend on how long the main cells have been dead and the unit's RAM has been maintained by the backup battery, if it has been months, perhaps this can happen, but it sounds like you use them enough that this is not the case.

My calculators are the ones in the signature, is it possible that it happens (randomly) on all of them? only the 39g+ seems to suffer less (but it doesn't have the buffer battery), the Casio does the same (but it doesn't have the buffer battery). the buffer batteries were checked months ago, they were good but I replaced them as a precaution without avoiding the problem

thanks for the feedback