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Which one is full and which one is low ?
This is question we ask when replacing the battery of electrical appliance which does not work any longer . Not knowing which one of the batteries are full and which one are low makes us confused in replacing them . We can solve this problem by providing a small LED for any battery and when replacing the battery we can notice LED to see if it has been turned on then proceed to replace the relevant battery. Me.Me is a solution for this problem.
Milad Mohajeri & Alireza Haji Dehabadi