Update README.md

Author: martinbeentjes

README.md

@@ -4,12 +4,14 @@ Enables displaying battery percentage and status icon in tmux status-right.
 
 ## Installation
 
-In order to read the battery status, this plugin depends on having either one of the following installed:
+In order to read the battery status, this plugin depends on having either one of the following applications installed:
 - pmset
 - upower
 - acpi
 - termux-battery-status
 
+In a normal situation one of these above should be installed on your system by default and thus it would not be necessary to install one of them.
+
 ### Installation with [Tmux Plugin Manager](https://github.com/tmux-plugins/tpm) (recommended)
 
 Add plugin to the list of TPM plugins in `.tmux.conf`: