Message: Return type of CI_Session_files_driver::open($save_path, $name) should either be compatible with SessionHandlerInterface::open(string $path, string $name): bool, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice
Message: Return type of CI_Session_files_driver::close() should either be compatible with SessionHandlerInterface::close(): bool, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice
Message: Return type of CI_Session_files_driver::read($session_id) should either be compatible with SessionHandlerInterface::read(string $id): string|false, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice
Message: Return type of CI_Session_files_driver::write($session_id, $session_data) should either be compatible with SessionHandlerInterface::write(string $id, string $data): bool, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice
Message: Return type of CI_Session_files_driver::destroy($session_id) should either be compatible with SessionHandlerInterface::destroy(string $id): bool, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice
Message: Return type of CI_Session_files_driver::gc($maxlifetime) should either be compatible with SessionHandlerInterface::gc(int $max_lifetime): int|false, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice
Lithium-ion batteries are the most common types of batteries that we use on an everyday basis. These batteries power small devices such as a remote control and even large vehicles like a hybrid car.
A lithium-ion battery is a rechargeable battery. It has the mechanism in which lithium ions move from negative electrode towards positive electrode when discharging the battery and in the opposite direction when the battery is charging.
There are other types of lithium batteries, one of them is just called a lithium battery and is an important distinction from lithium-ion as the lithium battery is a nonrechargeable battery.
In the video, you will see how these lithium-ion batteries are produced for everyday use. It is quite fascinating how these high energy density batteries are manufactured to work in varied environments.
How Lithium-ion batteries are made