Solar-powered calculators
|
05-12-2020, 05:10 PM
(This post was last modified: 05-12-2020 05:30 PM by ijabbott.)
Post: #17
|
|||
|
|||
RE: Solar-powered calculators
(05-10-2020 01:31 AM)mfleming Wrote: The Casio fx-450 & fx-451 are solar only scientific calculators with keyboards on two halves like the 28s. Fairly unique, with a Radio Shack branded version of the 451. Yes, although the fx-451M in your picture has a backup battery to save settings and memory, although all the original batteries in these calculators will be dead by now, making most of them effectively solar only. I was mad enough to take mine apart and replace the battery. The calculator part can be unclipped from its frame using a spudger. When putting it back together, rub down the connector to the membrane keyboard, because it is likely to have become partially unstuck during the dismantling and battery replacement. Use a GR927, SR57, 395/399 or equivalent replacement battery, preferably silver oxide. — Ian Abbott |
|||
« Next Oldest | Next Newest »
|
User(s) browsing this thread: 3 Guest(s)