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		<title>Power Bank NV-SJ1020</title>
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		<pubDate>Sun, 14 Sep 2014 20:09:33 +0000</pubDate>
		<dc:creator>evgeny</dc:creator>
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		<description><![CDATA[Для зарядки батарей ультрамобильных электронных изделий можно использовать устройство Power Bank NV-SJ1020 
  
Евгений Рудометов 
  
  
  

Продлить автономную работу ультрамобильных электронных устройств, к которым относятся планшеты, смартфоны, аудио и видеоплееры и т. п., можно с помощью мобильных зарядных устройств, например, Power Bank NV-SJ1020.
Внешний вид устройства Power Bank NV-SJ1020 представлен на рис. 2, основные параметры — в таблице 1.

Рис. 1.  Внешний вид Power Bank [...]]]></description>
			<content:encoded><![CDATA[<p style="TEXT-ALIGN: justify"><em></em><em>Для зарядки батарей ультрамобильных электронных изделий можно использовать устройство Power Bank NV-SJ1020</em><em> </em></p>
<p style="TEXT-ALIGN: justify"><span id="more-57040"></span><img title="More..." src="https://www.rudometov.com/wp-includes/js/tinymce/plugins/wordpress/img/trans.gif" alt="trans Power Bank NV SJ1020"  /><img title="More..." src="https://www.rudometov.com/wp-includes/js/tinymce/plugins/wordpress/img/trans.gif" alt="trans Power Bank NV SJ1020"  /><img title="More..." src="https://www.rudometov.com/wp-includes/js/tinymce/plugins/wordpress/img/trans.gif" alt="trans Power Bank NV SJ1020"  /><img title="More..." src="https://www.rudometov.com/wp-includes/js/tinymce/plugins/wordpress/img/trans.gif" alt="trans Power Bank NV SJ1020"  /><img title="More..." src="https://www.rudometov.com/wp-includes/js/tinymce/plugins/wordpress/img/trans.gif" alt="trans Power Bank NV SJ1020"  /><img src="https://www.rudometov.com/wp-includes/js/tinymce/plugins/wordpress/img/trans.gif" alt="trans Power Bank NV SJ1020"  title="Power Bank NV SJ1020" /><img 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src="https://www.rudometov.com/wp-includes/js/tinymce/plugins/wordpress/img/trans.gif" alt="trans Power Bank NV SJ1020"  title="Power Bank NV SJ1020" /><img src="https://www.rudometov.com/wp-includes/js/tinymce/plugins/wordpress/img/trans.gif" alt="trans Power Bank NV SJ1020"  title="Power Bank NV SJ1020" /><img src="https://www.rudometov.com/wp-includes/js/tinymce/plugins/wordpress/img/trans.gif" alt="trans Power Bank NV SJ1020"  title="Power Bank NV SJ1020" /><img src="https://www.rudometov.com/wp-includes/js/tinymce/plugins/wordpress/img/trans.gif" alt="trans Power Bank NV SJ1020"  title="Power Bank NV SJ1020" /><img src="https://www.rudometov.com/wp-includes/js/tinymce/plugins/wordpress/img/trans.gif" alt="trans Power Bank NV SJ1020"  title="Power Bank NV SJ1020" /><img src="https://www.rudometov.com/wp-includes/js/tinymce/plugins/wordpress/img/trans.gif" alt="trans Power Bank NV SJ1020"  title="Power Bank NV SJ1020" /><img src="https://www.rudometov.com/wp-includes/js/tinymce/plugins/wordpress/img/trans.gif" alt="trans Power Bank NV SJ1020"  title="Power Bank NV SJ1020" /><img src="https://www.rudometov.com/wp-includes/js/tinymce/plugins/wordpress/img/trans.gif" alt="trans Power Bank NV SJ1020"  title="Power Bank NV SJ1020" /><img src="https://www.rudometov.com/wp-includes/js/tinymce/plugins/wordpress/img/trans.gif" alt="trans Power Bank NV SJ1020"  title="Power Bank NV SJ1020" /><img src="https://www.rudometov.com/wp-includes/js/tinymce/plugins/wordpress/img/trans.gif" alt="trans Power Bank NV SJ1020"  title="Power Bank NV SJ1020" /><img src="https://www.rudometov.com/wp-includes/js/tinymce/plugins/wordpress/img/trans.gif" alt="trans Power Bank NV SJ1020"  title="Power Bank NV SJ1020" /><img src="https://www.rudometov.com/wp-includes/js/tinymce/plugins/wordpress/img/trans.gif" alt="trans Power Bank NV SJ1020"  title="Power Bank NV SJ1020" /><img 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src="https://www.rudometov.com/wp-includes/js/tinymce/plugins/wordpress/img/trans.gif" alt="trans Power Bank NV SJ1020"  title="Power Bank NV SJ1020" /><img src="https://www.rudometov.com/wp-includes/js/tinymce/plugins/wordpress/img/trans.gif" alt="trans Power Bank NV SJ1020"  title="Power Bank NV SJ1020" /><img src="https://www.rudometov.com/wp-includes/js/tinymce/plugins/wordpress/img/trans.gif" alt="trans Power Bank NV SJ1020"  title="Power Bank NV SJ1020" /><img src="https://www.rudometov.com/wp-includes/js/tinymce/plugins/wordpress/img/trans.gif" alt="trans Power Bank NV SJ1020"  title="Power Bank NV SJ1020" /><strong> </strong><strong> </strong></p>
<p style="TEXT-ALIGN: right"><strong>Евгений Рудометов <br />
</strong><strong>  </strong></p>
<p style="TEXT-ALIGN: right"><strong> </strong> <br />
  
</p>
<p style="TEXT-ALIGN: justify">Продлить автономную работу ультрамобильных электронных устройств, к которым относятся планшеты, смартфоны, аудио и видеоплееры и т. п., можно с помощью мобильных зарядных устройств, например, Power Bank NV-SJ1020.</p>
<p style="TEXT-ALIGN: justify">Внешний вид устройства Power Bank NV-SJ1020 представлен на рис. 2, основные параметры — в таблице 1.</p>
<p style="TEXT-ALIGN: justify"><a href="https://www.rudometov.com/power-bank-nv-sj1020/power-bank-nv-sj1020-01/" rel="nofollow" target="_blank" rel="attachment wp-att-57041" ><img class="alignnone size-large wp-image-57041" title="Power Bank NV-SJ1020 01" src="https://www.rudometov.com/wp-content/uploads/2014/09/Power-Bank-NV-SJ1020-01-500x375.jpg" alt="Power Bank NV-SJ1020 01" width="500" height="375" /></a></p>
<p style="TEXT-ALIGN: justify"><em>Рис. 1.  Внешний вид </em><em>Power Bank NV-SJ1020</em></p>
<p style="TEXT-ALIGN: justify"><em>       </em></p>
<p><strong>Таблица 1.  Основные параметры  Power Bank NV-SJ1020</strong></p>
<table border="1" cellspacing="0" cellpadding="0">
<tbody>
<tr>
<td colspan="2" rowspan="2" width="106" valign="top">Встроенный аккумулятор</td>
<td width="120" valign="top">Емкость, мА*ч</td>
<td width="105" valign="top">8400</td>
</tr>
<tr>
<td width="120" valign="top">Тип</td>
<td width="105" valign="top">Литий-ионный</td>
</tr>
<tr>
<td rowspan="4" width="76" valign="top">USB<br />
(Output)</td>
<td rowspan="2" width="30" valign="top">№1</td>
<td width="120" valign="top">Напряжение, В</td>
<td width="105" valign="top">5.0</td>
</tr>
<tr>
<td width="120" valign="top">Ток, А</td>
<td width="105" valign="top">2</td>
</tr>
<tr>
<td rowspan="2" width="30" valign="top">№2</td>
<td width="120" valign="top">Напряжение, В</td>
<td width="105" valign="top">5.0</td>
</tr>
<tr>
<td width="120" valign="top">Ток, А</td>
<td width="105" valign="top">1</td>
</tr>
<tr>
<td colspan="2" rowspan="2" width="106" valign="top">MicroUSB<br />
(Input)</td>
<td width="120" valign="top">Напряжение, В</td>
<td width="105" valign="top">5.0</td>
</tr>
<tr>
<td width="120" valign="top">Ток, А</td>
<td width="105" valign="top">1</td>
</tr>
<tr>
<td colspan="2" rowspan="2" width="106" valign="top">Индикатор</td>
<td width="120" valign="top">Кол-во, шт</td>
<td width="105" valign="top">4</td>
</tr>
<tr>
<td width="120" valign="top">Тип</td>
<td width="105" valign="top">Светодиоды</td>
</tr>
<tr>
<td colspan="3" width="226" valign="top">Габариты, мм</td>
<td width="105" valign="top">98х70х21</td>
</tr>
<tr>
<td colspan="3" width="226" valign="top">Вес, г</td>
<td width="105" valign="top">182</td>
</tr>
</tbody>
</table>
<p>      </p>
<p style="TEXT-ALIGN: justify">Конструктивно Power Bank NV-SJ1020 выполнен в пластиковом корпусе, выполненном в форме плоского параллепипеда (рис. 1, рис. 2), углы и грани которого скруглены.</p>
<p style="TEXT-ALIGN: justify">      </p>
<p style="TEXT-ALIGN: justify"><em><a href="https://www.rudometov.com/power-bank-nv-sj1020/power-bank-nv-sj1020-02/" rel="nofollow" target="_blank" rel="attachment wp-att-57044" ><img class="alignnone size-large wp-image-57044" title="Power Bank NV-SJ1020 02" src="https://www.rudometov.com/wp-content/uploads/2014/09/Power-Bank-NV-SJ1020-02-396x500.jpg" alt="Power Bank NV-SJ1020 02" width="396" height="500" /></a></em></p>
<p style="TEXT-ALIGN: justify"><em>Рис. 1.  Верхняя и нижняя стороны </em><em>Power Bank NV-SJ1020</em></p>
<p style="TEXT-ALIGN: justify"><em>       </em></p>
<p style="TEXT-ALIGN: justify">На одном из торцов находятся два порта USB, которые предназначены для зарядки мобильных устройств. Один порт обеспечивает ток 2 А при напряжении 5 В. Второй порт обеспечивает ток 1 А при напряжении 5 В.</p>
<p style="TEXT-ALIGN: justify">На одной из двух скругленных граней находится порт Micro USB, служащий для зарядки встроенной в устройство литий-ионной батареи. Он рассчитан на ток 1 А при наряжении 5 В. </p>
<p style="TEXT-ALIGN: justify">На верхней грани корпуса расположена кнопка и четыре индикаторных светодиодов, которые указывают на уровень заряда внутренней батареи: четыре горящих светодиода — 100% заряда, три — 75%, два — 50%, один — 25%. Индикация включается нажатием на кнопку.</p>
<p style="TEXT-ALIGN: justify">Кстати, Power Bank NV-SJ1020 можно использовать еще и как фонарик, включаемый двойным нажатием на кнопку. </p>
<p style="TEXT-ALIGN: justify">Указанные элементы представлены и описаны на рис. 3.</p>
<p style="TEXT-ALIGN: justify">      </p>
<p style="TEXT-ALIGN: justify"><a href="https://www.rudometov.com/power-bank-nv-sj1020/power-bank-nv-sj1020-03/" rel="nofollow" target="_blank" rel="attachment wp-att-57042" ><img class="alignnone size-large wp-image-57042" title="Power Bank NV-SJ1020 03" src="https://www.rudometov.com/wp-content/uploads/2014/09/Power-Bank-NV-SJ1020-03-500x320.jpg" alt="Power Bank NV-SJ1020 03" width="500" height="320" /></a></p>
<p style="TEXT-ALIGN: justify"><em>Рис. 3.  Порты, индикаторы и кнопка </em><em>Power Bank NV-SJ1020</em></p>
<p style="TEXT-ALIGN: justify">      </p>
<p style="TEXT-ALIGN: justify">Для анализа возможностей Power Bank NV-SJ1020 был выбран планшет iPad первого поколения. При этом перед тестированием внутренняя батарея данного устройства была специально разряжена до 2%.</p>
<p style="text-align: justify;">Как показало тестирование, весь запас энергии полностью заряженного Power Bank NV-SJ1020, переданный через двухамперный порт USB, позволил зарядить iPad от уровня 2% до 72%, то есть энергия внутренней батареи была увеличена на 70%.</p>
<p style="text-align: justify;">Анализируя полученные оценки, вполне возможно, что некоторые пользователи обратят внимание на кажущиеся несоответствие между объявленной энергоемкостью Power Bank NV-SJ1020 и величиной энергии, переданной аккумулятору планшета. Однако следует учитывать, что в процессе передачи энергии часть ее теряется в цепях преобразователей. Ниже приведена численная оценка эффективности (можно сказать, что это аналог кпд).</p>
<p style="text-align: justify;">Емкость аккумулятора iPad первого поколения составляет, как известно, ~6613 мА*ч (24,8 Вт*ч / 3,75 В). В процессе зарядки аккумулятору был передан заряд ~4630 мА*ч (70% заряда батареи iPad). Учитывая, что объявленная производителем емкость Power Bank NV-SJ1020 равна 8400 мА*ч, эффективность преобразования составила ~55%.</p>
<p style="text-align: justify;">Оценка эффективности показала, что около половины накопленной энергии Power Bank NV-SJ1020 теряется в процессе преобразований. <strong><a href="https://www.rudometov.com/pny-powerpack-2600-2/" rel="nofollow" target="_blank" >Как уже однажды упоминалось</a></strong>, потеря энергии — это не дефект конструкции, а проявление законов физики и химии, хотя следует признать, что встречаются <strong><a href="https://www.rudometov.com/pny-powerpack-2600-1/" rel="nofollow" target="_blank" >модели зарядных устройств</a></strong>, обеспечивающие более эффективное преобразование накопленной энергии в <strong><a href="https://www.rudometov.com/pny-powerpack-2600-2/" rel="nofollow" target="_blank" >аналогичных экспериментах</a></strong>.<strong><br />
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