diff --git a/power-supply/record_manager.hpp b/power-supply/record_manager.hpp
index 73459df..e1a2cfc 100644
--- a/power-supply/record_manager.hpp
+++ b/power-supply/record_manager.hpp
@@ -53,6 +53,7 @@
 
         static constexpr auto RAW_RECORD_SIZE = 5;
         static constexpr auto RAW_RECORD_ID_OFFSET = 0;
+        static constexpr auto FIRST_SEQUENCE_ID = 0;
         static constexpr auto LAST_SEQUENCE_ID = 0xFF;
 
         using DBusRecord = std::tuple<uint64_t, int64_t>;
@@ -91,6 +92,22 @@
         }
 
         /**
+         * @brief Adds a new entry to the history
+         *
+         * Also checks to see if the old history should be
+         * cleared, such as when there is an invalid record
+         * sequence ID or if there was no data from the PS.
+         *
+         * @param[in] rawRecord - the record data straight
+         *                    from the power supply
+         *
+         * @return bool - If there has been a change to the
+         *                history records that needs to be
+         *                reflected in D-Bus.
+         */
+        bool add(const std::vector<uint8_t>& rawRecord);
+
+        /**
          * @brief Converts a Linear Format power number to an integer
          *
          * The PMBus spec describes a 2 byte Linear Format