Vintage Texas Instruments Ti-2550 from 1975 is in great condition and holds a charge as shown in photos. I do not know for how long it holds a charge but it takes and held it for the day I tested prior to listing.

There is no charger that comes with the item so please make sure to purchase a universal adapter charger if you wish to use this item. The original box is also missing from this, however, it has the manual and owner’s original business card as seen in the photos.

If you have any questions please feel free ti message me and I will reply as soon as I can.

If the pricing does not meet your expectations please consider an offer.