Battery improve output

- colored capacity
- show model and manufacturer only if they exists

bin/battery

@@ -78,8 +78,8 @@ def read_battery(filename):
 def load_battery_info(info):
 	return BatteryInfo(
 		name = info['POWER_SUPPLY_NAME'],
-        model = info['POWER_SUPPLY_MODEL_NAME'],
-        manufacturer = info['POWER_SUPPLY_MANUFACTURER'],
+        model = info.get('POWER_SUPPLY_MODEL_NAME', ''),
+        manufacturer = info.get('POWER_SUPPLY_MANUFACTURER', ''),
 		technology = info['POWER_SUPPLY_TECHNOLOGY'],
 		capacity = float(info['POWER_SUPPLY_CHARGE_FULL']) / 1e6,
 		status = info['POWER_SUPPLY_STATUS'],
@@ -115,8 +115,23 @@ def format_time_to_empty(info):
 		return terminal_colored(f"{hours}:{minutes:02d}", CYAN)
 
 
+def battery_model(info):
+	model = ''
+	if info.model:
+		model += info.model
+	if info.manufacturer:
+		if model:
+			model += ' - '
+		model += info.manufacturer
+	if model:
+		model += ': '
+	return model
+
+
 def print_battery_detail(info):
-	print(f"Battery: {info.model} - {info.manufacturer}: {info.technology} {info.capacity} Ah")
+	model = battery_model(info)
+	capacity = terminal_colored(str(info.capacity), YELLOW)
+	print(f"Battery: {model}{info.technology} {capacity} Ah")
 	print("Battery level: " + format_percent(info))
 	print("Battery status: " + format_status(info))
 	if info.status == DISCHARNGING: