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. 2009 Jul 28;9(8):5968–5988. doi: 10.3390/s90805968

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© 2009 by the authors; licensee MDPI, Basel, Switzerland

This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution license (http://creativecommons.org/licenses/by/3.0/).

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Figure 14. — Battery-level (V) vs. time (D:HH:MM). Digital Voltage Meter (DVM) was used to measure the battery-level and T-Sensor-v node itself monitored its battery-level.