This Commodore SR4148R scientific calculator has been refurbished and its battery has been changed. The calculator works perfectly.
Alexandru Balasa Articles
AC Adapter AC9130A
Fully tested Texas Instruments AC adapter AC9130A. The adapter is used for a number of TI calculators among them SR-16, SR-50A, SR-51A, SR-52, SR-56, TI-2550 II, TI-2550 III (there are others too).
AC Adapter HP-82087A
Fully tested AC Adapter HP-82087A. This AC adapter is used for the Spice family of calculators: HP-31 HP-32e HP-33e HP-33c HP-34c HP-37 HP-38e HP-38c. It is 110V only.
AC Adapter HP-82059B
Fully tested AC adapter HP-82059B. This AC adapter is used for many HP calculators and peripherals, among them HP-41C / CV / CX with rechargeable battery, printer HP-82143A, printer HP-82162A, cassette tape HP-82161A, the TopCat family of calculators (HP-91, 92, 97), HP-71 and HP-75.
AC Adapter HP-82026A
Fully tested AC adapter HP-82026A for the Woodstock family of calculators. It is switchable from 110V to 220V but it only has the US plug.
eBay seller rating: what is it
I have discovered that as a small seller, you do not really need to concern yourself with the seller rating. As a business, having a store and a large amount in sales, you definitely need to be!
How to sell on eBay: part 2
In...
How to sell on eBay: part 1
How...
Open a TopCat battery
The TopCat battery is fits the HP-91, 92, 97 and 97s series of calculators and a number of peripherals (printers 82143,m 82162, tape reader 82161) and is not designed to be refurbished, it is glued shut. Nevertheless since there are no new batteries to be bought, if you want a battery, you need to refurbish an existing one.