diff --git a/doc/hardware/peripherals/charger.rst b/doc/hardware/peripherals/charger.rst
index 0198fe11f65..e0285d036d0 100644
--- a/doc/hardware/peripherals/charger.rst
+++ b/doc/hardware/peripherals/charger.rst
@@ -5,6 +5,18 @@ Chargers
 
 The charger subsystem exposes an API to uniformly access battery charger devices.
 
+A charger device, or charger peripheral, is a device used to take external power provided to the
+system as an input and provide power as an output downstream to the battery pack(s) and system.
+The charger device can exist as a module, an integrated circuit, or as a functional block in a power
+management integrated circuit (PMIC).
+
+The action of charging a battery pack is referred to as a charge cycle. When the charge cycle is
+executed the battery pack is charged according to the charge profile configured on the charger
+device. The charge profile is defined in the battery pack's specification that is provided by the
+manufacturer. On charger devices with a control port, the charge profile can be configured by the
+host controller by setting the relevant properties, and can be adjusted at runtime to respond to
+environmental changes.
+
 Basic Operation
 ***************