I have a HP 45 I bought new in 1973 while in college and have used since. I have had other calculators since including two other newer HP's but find the RPL with the stacked registers ect. to be the best system for my use, I also prefer the LED display.
Unfortunately my HP 45 is operateing irratically. It stoped charging the batteries several years ago, and now only self checks and works sporatically. I bought another HP 45 on E-bay, and it does the same thing. I now think the charger is bad. My question is who can check and repair the charger and calculators, I am trying to buy another charger on E-bay but would still like to have a backup. I am also confused about running the calculator without a battery pack from the charger.
Bruce
H P 45
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