AP_BattMonitor: fixed typos

libraries/AP_BattMonitor/AP_BattMonitor_SMBus.cpp

@@ -133,7 +133,7 @@ uint8_t AP_BattMonitor_SMBus::get_PEC(const uint8_t i2c_addr, uint8_t cmd, bool
         return 0;
     }
 
-    // prepare temp buffer for calcing crc
+    // prepare temp buffer for calculating crc
     uint8_t tmp_buff[len+3];
     tmp_buff[0] = i2c_addr << 1;
     tmp_buff[1] = cmd;

libraries/AP_BattMonitor/AP_BattMonitor_SMBus_Maxell.cpp

@@ -79,7 +79,7 @@ void AP_BattMonitor_SMBus_Maxell::timer()
 
     read_full_charge_capacity();
 
-    // FIXME: Preform current integration if the remaining capacity can't be requested
+    // FIXME: Perform current integration if the remaining capacity can't be requested
     read_remaining_capacity();
 
     read_temp();

libraries/AP_BattMonitor/AP_BattMonitor_SMBus_Solo.cpp

@@ -9,7 +9,7 @@
 #define BATTMONITOR_SMBUS_SOLO_CELL_VOLTAGE         0x28    // cell voltage register
 #define BATTMONITOR_SMBUS_SOLO_CURRENT              0x2a    // current register
 #define BATTMONITOR_SMBUS_SOLO_BUTTON_DEBOUNCE      6       // button held down for 5 intervals will cause a power off event
-#define BATTMONITOR_SMBUS_SOLO_NUM_CELLS            4       // solo's battery back is 4S
+#define BATTMONITOR_SMBUS_SOLO_NUM_CELLS            4       // solo's battery pack is 4S
 
 /*
  * Other potentially useful registers, listed here for future use