~I bought a*laptop battery*the day before yesterday in www.rabattakkus.com There is usually a label on the battery. The label will have the part number,*chemicalconstruction (eg Li-Ion, NiMh), voltage and current printed on it. Please note the battery voltage is not the same as the*power supplies*voltage. If this information is not present the make and model of your laptop would help any sales person identify the correct battery.