Wanted: Battery for TE "The MBA" calculator

From: The MBA
Email: postbox@hotpop.com

Comments

Hi, The battery in my Texas Instrument calculator, The MBA is dead. The battery in the back says BP-7 but when I actually open the pack there are two batteries without any marking on them. Can someone tell me where I can buy these batteries or the specifications of these batteries so I can replace it with an equivalent.