Posts: 291
Threads: 43
Joined: Jun 2007
Well, the AC adapter from any of the classic series will work, and this would include the HP 67, of which there are usually a few up for auction (with AC adapters) on e-bay at any given time. I occasionally see just an AC adapter being offered also (but I admit not very often). If cashflow allows, you could buy one the 67's off of e-bay, keep the adapter, and re-sell the calculator. Or better yet, keep the 67 and enjoy it too! (that's what I'd do).
Best regards, Hal
Posts: 883
Threads: 17
Joined: Feb 2006
The plug on your 45 is custom HP for which there is no substitute. 82002 chargers alone can be had on eBay on a fairly regular basis, $30-$40 is the average for a known good unit. All LED classics (35/45/55/65/67/70/80) use the same charger.
Buying an untested unit is a iffy proposition, 30% or more may have broken wires rendering them DOA. They can usually be fixed but it's a pain in the butt.
The 82002 contains two supplies, one current controlled 50 ma source to charge the batteries and a 4.5 volt supply to run the calculator.
You can run the calculator with a 5vdc supply alone and forgo the batteries it you're not a purist ;^)
Posts: 10
Threads: 5
Joined: Jan 1970
I had the same problem with my HP-67. I just bought a standard 3xAA plastic battery holder, made a little work with Xacto blade to fit it in battery compartment, solder 2 wires and now i can use up-to-date 2300 NiMh cells filled with a high speed charger :)