Tried out this app called "Elixir" & found it amazingly nice & useful.

Here is the official description:
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Do you want to know everything about your device? Try Elixir and its widgets!

Elixir is a system information application with highly configurable widgets. Displays information about battery, cpu usage, memory usage, internal and external storage (sd-card), display, wifi, mobile network, location services (gps), bluetooth, sync, airplane mode, sensors, etc.
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Link: https://market.android.com/details?id=bt.android.elixir