What do you mean by average and intensive battery usage?

For all hotspot models offered, the battery life is indicated based upon tests conducted using the following methods:

Average Usage
Two smartphones connected, each using 2 email accounts, 1 WhatsApp account, and 1 Facebook account.
Using the web browser for 20 minutes, Google Maps for 20 minutes, and streaming one video 640x480 for 10 minutes.

Intensive Usage
Four smartphones connected, each using 2 email accounts, 1 WhatsApp account, and 1 Facebook account.
Using the web browser for 30 minutes, Google Maps for 30 minutes, and streaming one video 640x480 for 20 minutes.

Please remember that battery life can depend on other factors, such as coverage.