Ihave lexus RX400h 2007 ,hybrid battery is dead, ist still in the warranty time?

What is your question?

my car before three weeks didn't work and i changed the small battery and when i starting to operate my car READY word appear just for seconds then hided and the engine off and not starting. When i test the car by the hybrid testing device the electrician told me to replace the hybrid battery. I want to know if my hybrid battery still in the warranty time. thanks very much.

What makes this problem better or worse?

its not working

How long has your 2007 Lexus RX400h had this problem?

three weeks