Ich habe es im Code skizziert.
Code:
                                Last
                        +       ___
                     +-----+---|___|-+     AX = Akku
                   ~ A     A         |
         +-----------+     |        ===    LG = Ladegerät
         |       +---(-----+ ~      GND
        +|      +|   A     A   .---.
     A1  -   A2  -   +-----+---|LG |-+
        ---     ---     -      '---' |
        -|      -|                  ===
        ===     ===                 GND
        GND     GND

(created by AACircuit v1.28.6 beta 04/19/05 www.tech-chat.de)