diff --git a/libraries/AP_BattMonitor/AP_BattMonitor_SMBus_Maxell.cpp b/libraries/AP_BattMonitor/AP_BattMonitor_SMBus_Maxell.cpp
index 0578fae41f..d5da439381 100755
--- a/libraries/AP_BattMonitor/AP_BattMonitor_SMBus_Maxell.cpp
+++ b/libraries/AP_BattMonitor/AP_BattMonitor_SMBus_Maxell.cpp
@@ -15,6 +15,14 @@ extern const AP_HAL::HAL& hal;
 #define BATTMONITOR_SMBUS_MAXELL_SPECIFICATION_INFO    0x1a    // specification info
 #define BATTMONITOR_SMBUS_MAXELL_MANUFACTURE_NAME  0x20    // manufacturer name
 
+#define BATTMONITOR_SMBUS_MAXELL_CELL_VOLTAGES 6
+uint8_t maxell_cell_ids[] = { 0x3f,  // cell 1
+                              0x3e,  // cell 2
+                              0x3d,  // cell 3
+                              0x3c,  // cell 4
+                              0x3b,  // cell 5
+                              0x3a}; // cell 6
+
 #define SMBUS_READ_BLOCK_MAXIMUM_TRANSFER    0x20   // A Block Read or Write is allowed to transfer a maximum of 32 data bytes.
 
 #define SMBUS_PEC_POLYNOME  0x07 // Polynome for CRC generation
@@ -28,12 +36,6 @@ extern const AP_HAL::HAL& hal;
  * #define BATTMONITOR_SMBUS_MAXELL_DESIGN_VOLTAGE        0x19    // design voltage register
  * #define BATTMONITOR_SMBUS_MAXELL_MANUFACTURE_DATE      0x1b    // manufacturer date
  * #define BATTMONITOR_SMBUS_MAXELL_SERIALNUM             0x1c    // serial number register
- * #define BATTMONITOR_SMBUS_MAXELL_CELL_VOLTAGE6         0x3a    // cell voltage register
- * #define BATTMONITOR_SMBUS_MAXELL_CELL_VOLTAGE5         0x3b    // cell voltage register
- * #define BATTMONITOR_SMBUS_MAXELL_CELL_VOLTAGE4         0x3c    // cell voltage register
- * #define BATTMONITOR_SMBUS_MAXELL_CELL_VOLTAGE3         0x3d    // cell voltage register
- * #define BATTMONITOR_SMBUS_MAXELL_CELL_VOLTAGE2         0x3e    // cell voltage register
- * #define BATTMONITOR_SMBUS_MAXELL_CELL_VOLTAGE1         0x3f    // cell voltage register
  * #define BATTMONITOR_SMBUS_MAXELL_HEALTH_STATUS         0x4f    // state of health
  * #define BATTMONITOR_SMBUS_MAXELL_SAFETY_ALERT          0x50    // safety alert
  * #define BATTMONITOR_SMBUS_MAXELL_SAFETY_STATUS         0x50    // safety status
@@ -74,6 +76,14 @@ void AP_BattMonitor_SMBus_Maxell::timer()
         _state.healthy = true;
     }
 
+    for (uint8_t i = 0; i < BATTMONITOR_SMBUS_MAXELL_CELL_VOLTAGES; i++) {
+        if (read_word(maxell_cell_ids[i], data)) {
+            _state.cell_voltages.cells[i] = data;
+        } else {
+            _state.cell_voltages.cells[i] = UINT16_MAX;
+        }
+    }
+
     // timeout after 5 seconds
     if ((tnow - _state.last_time_micros) > AP_BATTMONITOR_SMBUS_TIMEOUT_MICROS) {
         _state.healthy = false;