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.
It also means you can have a larger and therefore longer lasting battery â 10 hours of music play and 15 hours of talk time, nearly twice as much as any other competing Bluetooth earbuds. Being able to turn off the Tone+ extends this already lengthy battery life.