I have an old Texas instruments BA-11 Executive Business Analyst Constant memory with a s erial no of I-1084 1327971 but have lost the user manual. Can I get one?

Here it is.

Here's the page showing the battery type for all TI business calculators:
http://epsstore.ti.com/OA_HTML/csksxvm.jsp?nSetId=68778

The TI BA-II Executive Business Analyst (maybe not your model) has a key labeled FIX. It is in the middle of the topmost row of keys. Press the FIX key followed by the number of decimal digits you want.

Press 2nd [FORMAT] 2 ENTER. FORMAT is the 2nd function of the decimal point key, ENTER is the second key on the top row of the keyboard.

Turn calculator ON. Press the MODE once or twice. As you do so look at the screen. When Mode is in Financial, the screens displays a small Fin.

Press the MODE button, once or twice. When calculator is in financial mode, the screen should display FIN.

This procedure is valid for The TI BA II (executive Business Analyst). Press [2nd][FIX] to access the (MODE) setting. As you execute the key sequence [2nd][FIX] the Mode change cycle s between FIN STAT and the regular computational mode.

Press 2nd, then press Decimal (STO) key

http://www.manualsonline.com/

Clear calc and mode registers & select two decimal places- ON/C, 2nd, CMR,FIX,2
Select FIN Mode - 2nd, FIN repeat until FIN shows up in display
Enter months in mortgage - N
Divide annual interest rate by 12 - Enter result as %i
Subtract down payment from cost of home - Enter result as PV
Compute monthly payment - 2nd, PMT
for Payments at beginning of month , press DUE, PMT

I have a question for you, what battery does the TI BA-II Constant Memory calculaor use?

Much thanks.

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