Texas Instuments SR-10 calculator or slide rule!

From: Lou Michaels
Email: Yardbird@Prodigy.net


TEXAS INSTRUMENSTS SR-10 Calculator battery charger. Can anyone tell me the polarity of the battery charger? I'm having to replace the plug. While I have your attention, where would one find the chargeable NiCad batteries? Need three 3.6v AA size roughly 400mAH Thanks for any help....Lou