HP 25 Battery Pack

[dking888]

I would like to find a battery pack for an HP 25 that didn't come with one.

Thank You,
Daniel King

[Dave Frederickson]

If a 3D-printed one will work for you. From Sylvain's Calculator Parts and Services.
https://www.shapeways.com/product/CT8EMA...1&li=shops
https://www.shapeways.com/product/ZKFJHG...7&li=shops
or
http://www.shapeways.com/product/6NQASTN...ery-holder
or
https://www.thecalculatorstore.com/epage...oodstock3D

You'll also need a spring for the first two.
https://www.ebay.com/itm/4-Sets-Dual-Ber...4272752668

[aj04062]

I have many dead ones that would need a rebuild. I'd let you have ones that are chipped for the cost of shipping.

Let me know
Adam

[David Hayden]

I ordered two from shipways and they work find. I had springs available, but thought that winding a paperclip might work too. Has anyone tried this or some other method to fabricate the spring themselves.

Assuming that you're going to use rechargeable AA batteries, be sure to label the battery holder with the proper battery polarity.