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.
The Energizer bunny of Bluetooth headsets, the Plantronics M55 claims up to 11 hours of talk-time, 16 days of standby time, and a new standby mode of 5 five months! These tall claims are the result of the built-in âDeepSleepâ technology, which smartly puts the phone in sleep mode when you arenât using it.