Battery for Dell Latitude E7240

Hello everyone,

I'm in a little bit of predicament. I want to buy a new battery for my laptop, but unfortunately can't afford to buy an original one, so I've decided to buy a compatible battery. I'd like to ask the experts here if a battery with a capacity of 2400 mAh + 11.1V is any good? How many hours will it last, how many months will it "live"... Stuff like that. I tried sharing a link to the model of the battery that I want to purchase, but for some reason I wasn't allowed to, or maybe I'm just doing something wrong.

Thank you for your time and help.