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1		-XWiki.Edwin
	1	+XWiki.kai

Content

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51	51
52	52	=== 1.4.1 Can i use send uplink in short period? ===
53	53
	54	+
54	54	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 transmit LoRa or NB-IoT, then the battery life may be decreased.
55	55
56	56
57		-=== 1.4.2 Can i replace battery with SPC1520? ===
	58	+=== 1.4.2 Can i replace battery without SPC1520? ===
58	58
	60	+
59	59	User can replace the battery with ER26500 without SPC1520, This will work. But will have reduced performance for example
60	60
61	61	1) Shorter Battery Life.
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95	95	[[image:http://wiki.dragino.com/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LHT65N-E5%20LoRaWAN%20Temperature_Humidity%20%26%20Illuminance%20Sensor%20User%20Manual/WebHome/image-20220515075440-2.png?width=272&height=338&rev=1.1||alt="image-20220515075440-2.png" height="338" width="272"]]
96	96
97	97
98		-= 3. Solar Panel + 3000mAh Li-on battery =
	100	+= 3. Solar Panel + 3000mAh Li-ion battery =
99	99
100	100	== 3.1 Internal Structure ==
101	101
	104	+
102	102	Below are the Internal Power Structure for -LS and -NS version.
103	103
104	104	[[image:image-20231231200632-1.png||height="479" width="933"]]
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106	106
107	107	== 3.2 Battery Info ==
108	108
109		-The battery use in -LS and -NS version are 3.7v li-on rechargable battery . Dimension: 803450 x 2 , and 3000mAh capacity. The connector type is PH2.0 2 pin connector.
110	110
	113	+The battery use in -LS and -NS version are 3.7v Li-ion rechargable battery . Dimension: 803450 x 2 , and 3000mAh capacity. The connector type is PH2.0 2 pin connector.
111	111
112		-== 3.3 Related Document ==
113	113
	116	+== 3.3 Solar Spec ==
	117	+
	118	+
	119	+* Dimension: 103 x 73 mm
	120	+* Max Power: 0.9 W
	121	+* Voltage at nominal power :5V (±5%)
	122	+* Current at nominal power: 180mA (±5%)
	123	+* Cell efficient : 22%
	124	+* UV resistance
	125	+
	126	+== 3.4 Related Document ==
	127	+
	128	+
114	114	* **[[Recharge Circuit. >>https://www.dropbox.com/scl/fo/p9iqzcmivaczpmhwufj6s/h?rlkey=9zq6irrzj46ajy933ghg5uw3m&dl=0]]**
115	115
	131	+== 3.5 Recharge without Solar ==
116	116
117		-== 3.4 Recharge without Solar ==
118	118
119	119	If user wants to recharge the battery without Solar Panel. Below are the steps
120	120
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122	122
123	123	[[image:image-20240109233955-1.png||height="234" width="593"]]
124	124
125		-b) Provide voltage to this connector(XHB2.54-2P) to recharge the battery.
126	126
	141	+b) Provide voltage to this connector(XHB2.54-2P) to recharge the battery. (Input Range: DC: 5~~12v)
127	127
	143	+[[image:image-20240110091157-1.png||height="307" width="599"]]
	144	+
	145	+
128	128	= 4. Power Consumption Analyze =
129	129
	148	+== 4.1 Method 1: Use Our Calculate Table ==
130	130
131	131	Dragino Battery powered product are all runs in Low Power mode. We have an update battery calculator which base on the measurement of the real device. User can use this calculator to check the battery life and calculate the battery life if want to use different transmit interval.
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145	145	[[image:http://wiki.dragino.com/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/D20-LBD22-LBD23-LB_LoRaWAN_Temperature_Sensor_User_Manual/WebHome/1675146895108-304.png?rev=1.1||alt="1675146895108-304.png"]]
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147	147
	167	+== 4.2 Method 2: Manual Calcuation. ==
	168	+
	169	+=== 4.2.1 For -LB / -LS LoRaWAN models base on ASR6601 ===
	170	+
	171	+The power consumption mainly include three parts:
	172	+
	173	+* Sleep Power  : Most time the CPU are in sleep mode. It is around 6uA, So **for one day**, total power consumption: 6uA x 24(hour) = 144 uAh = 0.144mAh (base on batter output voltage)
	174	+* Watch Dog Current: Internal Water Dog to monitor Software state: this is very small and same for each device.** for one day**: 0.003mAH
	175	+* Sampling Power: The power consume to read sensor for each sampling.
	176	+** Example, SN50v3-LB connect to an external sensor, each reading need to use 5V , and sensor require current 10mA and 2 seconds. So each sampling need 10mA x 2 seconds / 3600 = 0.0056mAh ( base on 5v). Assume 90% converter rate from 3.3v to 5v) , we can consider the mAh in 3.3v is 0.0056mAh/90% = **0.0062mAh per sampling**. If one day, SN50v3-LB read this sensor 3 times every hour. So **for one day**, the total power consumption is 0.0062mAh x 3 x 24 = 0.4464 mAh
	177	+* Transmit & Receive Power: this power consumption depends on the transmit power and the data rate (DR) settings. They are the same for all -LB and -LS series. Below are the reference
	178	+** EU868 band, TXP=0 (Max Power), DR=5 （Shortest Distance） : ~~0.0028mAh (base on 3.3v) (per transmit + receive).
	179	+** EU868 band, TXP=0 (Max Power), DR=0 （Longest Distance） :  ~~0.044 mAh (base on 3.3v) (per transmit + receive).
	180	+
	181	+So for SN50v3 with above sensor, we set 5V output to open 2 seconds every reading and set TDC = 20 minutes. So 72 reading and transmit every day
	182	+
	183	+The total power consumption is
	184	+
	185	+* EU868 , Good Signal : 0.144mAh + 0.003mAh + 0.0062mAh * 72 + 0.0028 mAh * 72 = 0.795 mAh per day. For the 8500mAh , if we consider 20% margin, we can use 8500mAh x 80% / 0.795mAh = 8553 days
	186	+* EU868 , Poor Signal: 0.144mAh + 0.003mAh + 0.0062mAh * 72 + 0.044 mAh * 72 = 3.7614 mAh per day, For the 8500mAh, if we consider 20% margin, we can use 8500mAh x 80% / 3.7614 mAh = 1807 days
	187	+
	188	+(((
	189	+
	190	+)))
	191	+
	192	+(% class="box warningmessage" %)
	193	+(((
	194	+Notice, actually deployment situation is more complicate and above calcualtion is base on lab. The calculation is only for reference. It doesn't response for the promising battery life.
	195	+)))
	196	+
	197	+
	198	+== 4.3 Method 3: Use AI to calculate. ==
	199	+
	200	+
	201	+
	202	+
	203	+
148	148	= 5. Debug for Battery running out shortly =
149	149
150	150
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158	158	User can also send us (support(at)dragino.com) record so check. a record like below with the info:** Battery**, **uplink time**, **DR**.
159	159
160	160	[[image:image-20230418000422-1.png]]
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