HP 15-r081nr Notebook PC - Manual (Page 43)

2. Remove the battery (3) from the computer.
To insert the battery, follow these steps:
CAUTION: Do not slant the battery as you insert it.
1. Holding the battery in the middle, slide the battery (1) straight into the computer until the battery
release latch locks into place.
2. Reset the battery lock latch (2) to the locked position.
Finding battery information
Help and Support provides the following tools and information about the battery:
Running on battery power 33