Hi and welcome to the forum:
It's customary to provide the Make/Model of your computer and answer a few other questions before we get started. Did you Upgrade the computer you are asking us about from an earlier version of Windows? If so, which version? For example, Win7/8/8.1/8.1.1.
In the meantime, does this problem occur with only the battery plugged into the laptop (No wall power or MAINS)? If you don't know, disconnect the battery and run on AC power with the adapter only. If the battery icon doesn't show up, if could be a faulty battery. This is more likely to apply to your situation if you upgraded your computer to W10 from an earlier version of Windows as suggested, since laptops over 2 years old often have failed...