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80	80	(% style="color:#037691" %)**NB-IoT Spec:**
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82		-* B1 @H-FDD: 2100MHz
83		-* B3 @H-FDD: 1800MHz
84		-* B8 @H-FDD: 900MHz
85		-* B5 @H-FDD: 850MHz
86		-* B20 @H-FDD: 800MHz
87		-* B28 @H-FDD: 700MHz
	82	+* - B1 @H-FDD: 2100MHz
	83	+* - B3 @H-FDD: 1800MHz
	84	+* - B8 @H-FDD: 900MHz
	85	+* - B5 @H-FDD: 850MHz
	86	+* - B20 @H-FDD: 800MHz
	87	+* - B28 @H-FDD: 700MHz
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89	89	(% style="color:#037691" %)**Battery:**
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521	521	(((
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818	818	[[image:image-20220908163102-2.png]]
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821		-== 2.8 Battery & Power Consumption ==
	822	+== 2.8  ​Battery Analysis ==
822	822
	824	+=== 2.8.1  ​Battery Type ===
823	823
824		-N95S31B uses ER26500 + SPC1520 battery pack. See below link for detail information about the battery info and how to replace.
825	825
826		-[[**Battery Info & Power Consumption Analyze**>>url:http://wiki.dragino.com/xwiki/bin/view/Main/How%20to%20calculate%20the%20battery%20life%20of%20Dragino%20sensors%3F/]] .
	827	+(((
	828	+The N95S31B battery is a combination of an 8500mAh Li/SOCI2 Battery and a Super Capacitor. The battery is none-rechargeable battery type with a low discharge rate (<2% per year). This type of battery is commonly used in IoT devices such as water meter.
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827	827
	831	+(((
	832	+The battery is designed to last for several years depends on the actually use environment and update interval.
	833	+)))
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	835	+(((
	836	+The battery related documents as below:
	837	+)))
	838	+
	839	+* [[Battery Dimension>>http://www.dragino.com/downloads/index.php?dir=datasheet/Battery/ER26500/]]
	840	+* [[Lithium-Thionyl Chloride Battery datasheet>>http://www.dragino.com/downloads/index.php?dir=datasheet/Battery/ER26500/]]
	841	+* [[Lithium-ion Battery-Capacitor datasheet>>http://www.dragino.com/downloads/index.php?dir=datasheet/Battery/ER26500/]]
	842	+
	843	+(((
	844	+[[image:image-20220709101450-2.png]]
	845	+)))
	846	+
	847	+
	848	+=== 2.8.2  Power consumption Analyze ===
	849	+
	850	+
	851	+(((
	852	+The file **DRAGINO_N95S31B-Power-Analyzer.pdf** from [[https:~~/~~/www.dropbox.com/sh/mlpd6l05bogvaf6/AABwAJLMttqG7i~~-~~-AyZcQkoua?dl=0>>https://www.dropbox.com/sh/mlpd6l05bogvaf6/AABwAJLMttqG7i--AyZcQkoua?dl=0]] describes a detail measurement to analyze the power consumption in different case. User can use it for design guideline for their project.
	853	+)))
	854	+
	855	+(((
	856	+
	857	+)))
	858	+
	859	+=== 2.8.3  ​Battery Note ===
	860	+
	861	+
	862	+(((
	863	+The Li-SICO battery is designed for small current / long period application. It is not good to use a high current, short period transmit method. The recommended minimum period for use of this battery is 5 minutes. If you use a shorter period time to uplink data, then the battery life may be decreased.
	864	+)))
	865	+
	866	+
	867	+=== 2.8.4  Replace the battery ===
	868	+
	869	+
	870	+(((
	871	+You can change the battery in the N95S31B.The type of battery is not limited as long as the output is between 3v to 3.6v. On the main board, there is a diode (D1) between the battery and the main circuit. If you need to use a battery with less than 3.3v, please remove the D1 and shortcut the two pads of it so there won't be voltage drop between battery and main board.
	872	+)))
	873	+
	874	+
	875	+(((
	876	+The default battery pack of N95S31B includes a ER26500 plus super capacitor. If user can't find this pack locally, they can find ER26500 or equivalence without the SPC1520 capacitor, which will also work in most case. The SPC can enlarge the battery life for high frequency use (update period below 5 minutes).
	877	+)))
	878	+
	879	+
829	829	= 3. ​ Access NB-IoT Module =
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1023	1023	* Provide as much information as possible regarding your enquiry (product models, accurately describe your problem and steps to replicate it etc) and send a mail to [[support@dragino.com>>url:http://../../../../../../D:%5C%E5%B8%82%E5%9C%BA%E8%B5%84%E6%96%99%5C%E8%AF%B4%E6%98%8E%E4%B9%A6%5CLoRa%5CLT%E7%B3%BB%E5%88%97%5Csupport@dragino.com]]
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