Abstract: A hermetically sealed flat cell with an alkaline electrolyte and a battery made out of a number of such cells. Both the positive and the negative electrode layer of each cell of the battery is provided with a supporting plate preferably covering the whole outside of respective layer. Said plate incorporates a current collector, the outside of each current collector being provided at the contact area with a relatively thick, plastic and sticky layer of chemically inert, water repellent adhesive. Each cell is covered with a plastics sheet that is preferably laminated and comprises two layers, the inside layer of which is chemically resistant and heat sealable, the outside layer being mechanically tough and resistant to oxygen transmission. Enclosing of each cell has been carried out by means of heat sealing in a vacuum.

Abstract: A starting aid and reserve light for vehicles, especially cars. The starting aid comprises at least two identical secondary batteries normally connected in parallel and charged together with the starter battery, when the car is in use. However, a solid state diode prevents the discharge of these batteries together with the starter battery. In case the starter battery is exhausted, being not capable of starting the motor, it can be sufficiently recharged by the starting aid. This is done by means of a switch disconnecting the diode, connecting said secondary batteries in series and simultaneously the resulting double voltage battery in parallel with the starter battery. The starting aid includes a lamp, providing a powerful, portable reserve light.