Concern about s21e with anduril

Hi guys

I need the wisdom of all of you.

I bought (and it hasn't arrived yet) a convoy s21e with anduril.

Looking forward to having it I searched the subreddit for info on the flashlight to satisfy my cravings and came across two comments that the anduril had quite a lot of power consumption and had even damaged the batteries in a matter of a few weeks.

How true is this? Maybe it was the constant use of the aux light?

I bought the flashlight from the Convoy store on Aliexpress with an EVE 50E battery.

Where I live, 18650 lithium batteries are not readily available, much less 21700 batteries.

I don't have a lot of money and this flashlight is a gift. I don't want to damage the battery after a month and have to buy another.

Thank you very much in advance for your answers

Extra info:

My main language is not english so please forgive any inconsistencies.

Green body, sst-40, 6500k.