Hi Sammie,
It is essential for a device to have notifications especially when saving battery and power. Here's how to set low battery warnings on your Surface Pro 4 running Windows 10:
- Open the Control Panel.
- Choose Hardware and Sound.
- Select Power Options.
- Next to the active power plan, click the link Change Plan Settings. 
- Click the Change Advanced Power Settings link under the Edit Plan Settings. 
- It will show the Power Options dialog box. Scroll down, and locate the item labeled Battery.
- Click the plus sign (+) by Battery to display various battery notification and action options. Choose the best option.
- Low-battery notification*:* Sets a warning for a low battery level.
- Click OK to finalize the settings.
You may also use Microsoft easy fix solutions for additional help. Choose **Find and fix problems with your computer's power settings to conserve power and extend battery life.**
Reply to us with the status of your issue. We'll be happy to assist you.
Regards.