final --> for primitives --> value can't change. for non-primitives --> you can't change the reference and point it to another object. Note : It is different from immutability.
Hands down, the Bluetooth speaker with the longest battery life is the Fugoo. It offers up to 40 hours of battery life, nearly twice the battery life of other leading Bluetooth speakers in this category. Given how long its battery lasts, you might even forget that the Fugoo needs to be plugged in to charge.
When it comes to JBL's Flip 3 Bluetooth speaker, it is. This third-generation model has a more streamlined, splashproof design and better battery life (at 10 hours), while the price remains the same at $100, Â£100 or AU$150.