I need to have a 12v battery attached to the arduino for constant running of arduino, but the problem is the charger that will charge the battery. Yes, there are a million ups systems for that but it will be expensive for just one arduino based system so i was thinking will it work it i connect the arduino to the battery terminal and also connect some automatic 12v battery charger with it too at the same time? It will charge the battery when it's low and also arduino will start getting the power from the battery (if there is power failure)
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