Turns out this was not the manual i was looking for. The concertmate 670 keyboard i have is a "Realistic" model made for Radio Shack and none of the diagrams on the owners manual i received matches up. HOWEVER, I must say the service Owners Manual provides was fast and efficient by being available online. The manual was in good readable condition and easily downloaded.
Actually, I was looking for this information for 3 years!...now thanks to you, the manual is on my hands and of great help, cause I understand now where I was doing wrong connections and wires...excellent, I'll be back to you if in need, thank you.
Text excerpt from page 784 (click to view)
Technical specifications
Operating time (fully charged), high power Operating time (fully charged), mid power Battery capacity Operating current Voltage Charging time 15 min 20 min 1 600 mAh 9A 9,6 V 12 - 16 h This machine meets the requirements of EU directive 89/336/EEG and EC directive 73/23/EEC with amendment 90/683/EEC and 89/336/EEC. Use only by Electrolux approved rechargable battery. Use of any other types of battery might cause leakage and danger.
The Electrolux Group is the world�s largest producer of powered appliances for kitchen, cleaning and outdoor use. More than 55 million Electrolux Group products (such as refrigerators, cookers, washing machines, vacuum cleaners, chain saws and lawn mowers) are sold each year to a value of approx. USD 14 billion in more than 150 countries around the world.