Battery alone will not do it. Like Halley said, you'll need additional components. If you just put a battery in parallel with another power supply, it will be drained.
You might search Google for examples of "battery backup circuit".
Battery alone will not do it. Like Halley said, you'll need additional components. If you just put a battery in parallel with another power supply, it will be drained.
You might search Google for examples of "battery backup circuit".