Hybrid battery replacement

hello,
Im just wondering when the hybrid battery normally says goodnight? ive seen on some other thread that the Gen 2 batteries feels sluggish at first, the engine sometimes takes a second to start and suddenly it just dies and the warning triangle starts flashing.
My Gen 3 has gone like... 350 000km (atleast thats why the odometer says, the dash has been replaced at some time so its fully possible the car has gone like 400 000km-500 000km), its been a taxi from like 2011 to 2014 then some idiots bought it in 2014, did stupid stuff to it and sold it to me in 2016 (ive luckily fixed what they screwed up myself or let the toyota dealership do it). But yea... the car has a changed out dashboard so its possible its gone further then what it says. Is it time to change the battery? The petrol engine sometimes feels sluggish when it starts up. like it takes a second before it starts up. My moms 2010 prius is not like that (hers have only gone 73 000km), it starts right away and it feels "quicker". My gas pedal is also feeling kinda sticky and the car doesnt react as fast as my moms, my moms react right away in power mode but mine kinda feels like its "revving up" before it goes if that makes sense. what do u guys think?
i still got hybrid battery warrenty until 2023 so it should be free to change it.

 

yea, we got hybrid warranty for like 10 yrs from the production date of the car, then its added on onemore year for every service u do at toyota.

And yea thats what i figured, ive been thinking about getting it replaced by toyota for months now but wanted to be sure it was the battery that makes some of the problems. Since i know the hybrid battery gives all the power to the engine and stuff.

 

actually they dont need any codes from what i know, they just need to test drive the car and see if it match up to the symptoms of a bad hybrid battery, that was atleast how it was tested when we changed out the hybrid battery in my dads 2013 Auris touring sports.

And actually, i just got off the phone with the dealership, my car came out of a service and hybrid healthcheck with test charging and stuff april 2017, and they said in their data the battery is all fine. So its not needed for them to check on it if i dont feel more then i feel with the performance, they did say that i should check out changing out the gas pedal tho. Since they also marked it as "sticky" and stuff at the serivce note they have.