I checked the specifications of MSM58321 It should operate down to 2.2 V. As an aside, I don’t understand why you put another nickel cadmium battery into your Hyperion. Nicad batteries are notorious for leaking corrosive electrolyte and doing serious damage to motherboards. A better solution would be to put in a 3v lithium CR2032 within a disc battery holder In the place of the nickel cadmium battery. To prevent the power supply from attempting to charge the CR2032, It would be necessary to cut the jumper at E1 and E2. With that jumper, cut the MSM58321 will run right off the battery and the battery will not charge when the computer is on. If you were to forget about the CR2032 and it leaked, its guts would be contained within the disc battery holder. But that is unlikely to happen; CR2032s are very stable and contain very little electrolyte.
I prefer to do so as well. But after dealing with the horrific damage done to PCB’s by NiCad (and lithium) electrolyte leakage I won’t put back original style batteries anymore. They can leak without warning and completely eliminate a large swath of traces much larger than the battery itself. Each to their own…
I'll have to pickup one of those small spot welders since there's little doubt I'll have to change the battery on my Hyperion. Thanks.
Thank you for keeping such a historically significant machine in operation, and for sharing your experience while doing so.
Thank you!
Nice fix!
Thank you!
Very nice job! :)
Thank you!
I checked the specifications of MSM58321 It should operate down to 2.2 V. As an aside, I don’t understand why you put another nickel cadmium battery into your Hyperion. Nicad batteries are notorious for leaking corrosive electrolyte and doing serious damage to motherboards. A better solution would be to put in a 3v lithium CR2032 within a disc battery holder In the place of the nickel cadmium battery. To prevent the power supply from attempting to charge the CR2032, It would be necessary to cut the jumper at E1 and E2. With that jumper, cut the MSM58321 will run right off the battery and the battery will not charge when the computer is on. If you were to forget about the CR2032 and it leaked, its guts would be contained within the disc battery holder. But that is unlikely to happen; CR2032s are very stable and contain very little electrolyte.
I try to keep parts original (even types of batteries) as much as I can. It should last a good generation
I prefer to do so as well. But after dealing with the horrific damage done to PCB’s by NiCad (and lithium) electrolyte leakage I won’t put back original style batteries anymore. They can leak without warning and completely eliminate a large swath of traces much larger than the battery itself. Each to their own…
Nice repair! Any interest in any cooperation? (PCBWay)