Recharging original batteries in HP 45, 65 and 25



#3

Is there any chance that the original batteries in my HP 45, 65 and 25 can be safely recharged? Or am I risking burst batteries? All show small signs of corrosion at the terminals, but in some cases it is just at the terminals.
Is there anyone on this forum who happens to be in the Twin Cities and has spare battery packs I can use for testing?


#4

I wouldn't try and use old batteries. You can go to that popular auction site (referred to here as TAS) and get new rechargeable battery packs for the 45 and 65. Just search for "hp 45 batteries calculator". For the 25, you can take the battery pack apart and put AA batteries in it. Check the batteries section of this website for more info. Here is a photo of the proper polarity for the HP25.

Dave

Edited to include link


Edited: 5 Mar 2013, 12:24 a.m.


Possibly Related Threads...
Thread Author Replies Views Last Post
  HP 50g : More on best rechargeable batteries Miguel Toro 1 245 12-12-2013, 05:31 PM
Last Post: David Hayden
  Strange HP 25 Problem (Repair) Onur Ilkorur 5 351 12-06-2013, 05:13 PM
Last Post: Onur Ilkorur
  WTF? W-here T-o F-ind the original hpmuseum forum? Alexander Oestert 40 1,940 12-05-2013, 01:25 PM
Last Post: Matthias Wehrli
  HP-25 Wayne Selway 1 172 11-22-2013, 12:58 PM
Last Post: Michael de Estrada
  HP 50g : Best rechargeable batteries ? Miguel Toro 14 562 11-16-2013, 03:35 PM
Last Post: Dieter
  HP Prime recharging bluesun08 4 262 10-24-2013, 06:08 PM
Last Post: Mike Powell
  HP-65 short circuit Ignacio Sánchez 2 226 10-22-2013, 08:27 AM
Last Post: Ignacio Sánchez Reig
  Storing HP-42S without batteries Yriarte 4 290 10-19-2013, 08:32 PM
Last Post: walter b
  Interesting Base Conversions - Porting a 1975 HP 25 Program to the HP 35S Eddie W. Shore 1 182 10-13-2013, 07:49 PM
Last Post: BruceH
  HP-12C batteries Yriarte 4 273 10-12-2013, 10:39 PM
Last Post: Yriarte

Forum Jump: