THEMA:

#include <Wire.h>
 
 
    #define BID_ADDRESS (0xA << 3 | 0x0)
 
    int bid_year, bid_month, bid_day;
    int bid_cells, bid_acctyp, bid_cap_h, bid_cap_l, bid_chcurr_h, bid_chcurr_l, bid_dchcurr_h, bid_dchcurr_l;
    int bid_actc_h, bid_actc_l, bid_actdc_h, bid_actdc_l, bid_maxc_h, bid_maxc_l;
    int bid_chcnt_h, bid_chcnt_l;
 
    // EEPROM Routine from http://www.arduino.cc/playground/Code/I2CEEPROM
    // adopted to read EEPROMS with 1 Byte address
    byte i2c_eeprom_read_byte( int deviceaddress, byte eeaddress ) {
      byte rdata = 0xFF;
      Wire.beginTransmission(deviceaddress);
    //  Wire.send((int)(eeaddress >> 8)); // MSB
    //  Wire.send((int)(eeaddress & 0xFF)); // LSB
      Wire.write ((int)(eeaddress));
      Wire.endTransmission();
      Wire.requestFrom(deviceaddress,1);
      if (Wire.available()) rdata = Wire.read();
      return rdata;
    }
 
    void setup() {
      // ...
      Wire.begin();   // start Wire library as I2C-Bus Master
      Serial.begin(9600); //
 
        int i;
        byte bid_data;
 
        Serial.print("BID-Adresse: ");
        Serial.println(BID_ADDRESS, HEX);   
 
      Serial.println("Start EEPROM_READ");
    for (i = 0; i <= 255; i++){
        Serial.print(i, DEC);
        Serial.print(": ");
        bid_data = i2c_eeprom_read_byte( BID_ADDRESS, i );
        Serial.println(bid_data, HEX);
          switch (i) {
        case 2:
          //Actual Chaged Capacity (mAh) High Byte
          bid_actc_h = bid_data;
          break;
        case 3:
          //Actual Chaged Capacity (mAh) Low Byte
          bid_actc_l = bid_data;
          break;
        case 4:
          //Maximum Chaged Capacity (mAh) High Byte
          bid_maxc_h = bid_data;
          break;
        case 5:
          //Maxiimum Chaged Capacity (mAh) Low Byte
          bid_maxc_l = bid_data;
          break;
        case 6:
          //Charging Cycles High Byte
          bid_chcnt_h = bid_data;
          break;
        case 7:
          //Charging Cycles Low Byte
          bid_chcnt_l = bid_data;
          break;
 
        case 64:
          //Year
          bid_year = bid_data;
          break;
        case 65:
          //Month
          bid_month = bid_data;
          break;
        case 66:
          //Day
          bid_day = bid_data;
          break;
        case 67:
          //Accu Type
          bid_acctyp = bid_data;
          break;
        case 68:
          //Cells
          bid_cells = bid_data;
          break;
        case 69:
          //Capacaity(mAh) High Byte
          bid_cap_h = bid_data;
          break;
        case 70:
          //Capacaity(mAh) Low Byte
          bid_cap_l = bid_data;
          break;
        case 71:
          //Charg. Current(mA) High Byte
          bid_chcurr_h = bid_data;
          break;
        case 72:
          //Charg. Current(mA) Low Byte
          bid_chcurr_l = bid_data;
          break;
        case 73:
          //Discharg. Current(mA) High Byte
          bid_dchcurr_h = bid_data;
          break;
        case 74:
          //Discharg. Current(mA) Low Byte
          bid_dchcurr_l = bid_data;
          break;
      }
 
        delay(5);
    }
      Serial.println("End EEPROM_READ");
 
 
    Serial.println("BID Daten:");
    Serial.print("Datum: ");
    Serial.print(bid_day);
    Serial.print(".");
    Serial.print(bid_month);
    Serial.print(".");
    Serial.print(2000 + bid_year);
    Serial.println("");
 
    Serial.print("Akku-Typ: ");
          switch (bid_acctyp) {
            case 0:
              Serial.print("NiCd");
              break;
            case 1:
              Serial.print("NiMH");
              break;
            case 2:
              Serial.print("LiPo");
              break;
            default:
              Serial.print(bid_acctyp);
              Serial.print("?");
              break;
          }
    Serial.println("");
 
    Serial.print("Zellenzahl: ");
    Serial.print(bid_cells);
    Serial.print(" -> ");
          switch (bid_acctyp) {
            case 0:
              Serial.print(1.2 * bid_cells);
              break;
            case 1:
              Serial.print(1.2 * bid_cells);
              break;
            case 2:
              Serial.print(3.7 * bid_cells);
              break;
          }
    Serial.print(" V");
    Serial.println("");
 
    Serial.print("Kapazitaet: ");
    Serial.print(bid_cap_h * 256 + bid_cap_l);
    Serial.print(" mAh");
    Serial.println("");
 
    Serial.print("Ladestrom: ");
    Serial.print(bid_chcurr_h * 256 + bid_chcurr_l);
    Serial.print(" mA");
    Serial.println("");
 
    Serial.print("Entladestrom: ");
    Serial.print(bid_dchcurr_h * 256 + bid_dchcurr_l);
    Serial.print(" mA");
    Serial.println("");
 
 
    Serial.print("akt. Lad.: ");
    Serial.print(bid_actc_h * 256 + bid_actc_l);
    Serial.print(" mAh");
    Serial.println("");
 
    Serial.print("max. Lad.: ");
    Serial.print(bid_maxc_h * 256 + bid_maxc_l);
    Serial.print(" mAh");
    Serial.println("");
 
    Serial.print("Ladezyklen: ");
    Serial.print(bid_chcnt_h * 256 + bid_chcnt_l);
    Serial.println("");
 
      // ...
    }
 
    void loop() {
      // ...
      // ...
    }