add battery widget

community/battery-widget.lua

@@ -0,0 +1,21 @@
+-- name = "Battery info"
+
+function on_resume()
+  local batt_info = system:get_battery_info()
+  local batt_strings = stringify_table(batt_info)
+  ui:show_lines(batt_strings)
+end
+
+function stringify_table(tab)
+  local new_tab = {}
+
+  for k,v in pairs(tab) do
+    table.insert(new_tab, k:capitalize()..": "..tostring(v))
+  end
+
+  return new_tab
+end
+
+function string:capitalize()
+  return (self:gsub("^%l", string.upper))
+end