Hewlett Packard 
HP Classic Calculator Battery Case 
includes Rechargeable 1000 maH AAA Battery cells
Fits the HP 35, 45, 55, 65, 67, HP70, HP80, HP75C/D and HP3465A
Model: HPClassicCase
Quick Specs:
Part Number:  It's a Deluxe battery Case!   HPClassicCase  
(Replaces original HP82001A & B packs) 
Battery Type: Rechargeable 1000 maH Ni-MH AAA batteries
Output Voltage:  3.6 Volt  
Dimensions: 2.2” X 1.7” X 0.56” wide  (56.0mm X 43.0mm X 4.3mm)

Model HPClassic fits the following Hewlett-Packard Calculators: 
1)  Classic Series Calculators:  HP35, HP45, HP55, HP65, HP67, HP70 and HP80, 
2)  HP75C and HP75D HP Computers and 
3)  HP3465A Digital Multimeter. 

Auction Deliverables Include:
1) New HPClassicCase Battery Pack 
2) Battery use and Storage                                                                                                       

Features:   This design fits great into all Classic style HP calculators.  There is a cover now over the battery pack that allows for noting when a battery should be checked or discarded (in about 3 years).  The case is better sealed than the other design, to reduce the chance of corrosion from leaking battery acid. 

This auction battery pack replaces the original HP battery pack serial numbers 82001A and 82001B.  This battery pack with rechargeable AAA batteries.  The case fits perfectly into all the above listed HP calculators.  Same connector geometry as the original battery packs.  Each battery pack case is free-replacement guaranteed for 90 days. 

The original Classic HP chargers/adapters transformers tend to wear out, after 45+ years of use. I have 10 of them that need new internal components.  Also, the wire connection plug that plugs into the calculator, tends to fail as the wire inside breaks.  This auction battery pack,  lets you remove the AAA individual cells and charge them externally on a third party AAA charger.  You can also substitute alkaline AAA cells if you want.  AAA alkaline cells work well and last a long time.  The charged Ni-MH cells from this auction run the all "8"s display for about 2 hours.  Normal use will run for days off and on calculating.

Battery Use and Storage:  Please protect your beautiful HP calculator!  All battery cells will eventually leak a corrosive acid that may harm your calculator.   If your not using the calculator for a long time, please consider removing the battery and place it in a sealed plastic bag in your refrigerator.  These devices are just too awesome to risk potential damage.  The date shown on the picture is really today's date plus 3 years.  I've run this auction for quite some time and have had many happy customers.

Shipping:  Shipping costs are listed below.  For multiple battery pack purchases contact me for actual shipping costs.  I will refund your extra shipping charges and only charge you actual shipping costs.  BTW, 93.9% of my sales are mailed in one day.   

Also check my other HP calculator battery packs for sale especially for the Spice HP 33-34-35 calculators and for the larger HP 95-97 calculators.    

Hope to add you to my list of satisfied customers.                           

Sincerely, Mark Hoskins