<P>1节5号电池8LED，把原配LED全部改为12000mcd的LED，改好后看看亮度、耗电量如何？</P>
<P>（ROCK玩的都是低端产品518－－21元/支，实惠实用啊）</P>
<P>烙铁预热中</P>
<P>改完了，使用14500供电，加3.3欧姆电阻限流，实测电池空载电压3.81V，LED端电压3.16V，LED总电流170ma，平均每LED电流21.25ma，LED的标准电流，不过如果电池满电的话，电流肯定会大些，估计在200ma左右，即每LED 25ma，电池电量即将用完时，电流估计120ma，每LED 15ma，均是大家认为的完美电流值，也可让大家放心保证LED的寿命。1粒满电14500可持续使用时间估计约4-5小时（可能更长），未改装的518使用1节5号电池，平均电流估计约350ma，2000MAH电池可使用估计约6小时（可能更长）</P>
<P>http://gracels.8u8.com/led/518.jpg</P>
<P>改装后的518
<img src="attachments/dvbbs/2004-10/20041025224716555.jpg" border="0" onload="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.alt=\'Click here to open new window\nCTRL+Mouse wheel to zoom in/out\';}" onmouseover="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.style.cursor=\'hand\'; this.alt=\'Click here to open new window\nCTRL+Mouse wheel to zoom in/out\';}" onclick="if(!this.resized) {return true;} else {window.open(\'attachments/dvbbs/2004-10/20041025224716555.jpg\');}" onmousewheel="return imgzoom(this);" alt="" /> </P>
<P>光斑对比图，左：改装后的518；右：未改装的518（改装后光色、聚光性能和亮度均有改善）
<img src="attachments/dvbbs/2004-10/2004102522472561.jpg" border="0" onload="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.alt=\'Click here to open new window\nCTRL+Mouse wheel to zoom in/out\';}" onmouseover="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.style.cursor=\'hand\'; this.alt=\'Click here to open new window\nCTRL+Mouse wheel to zoom in/out\';}" onclick="if(!this.resized) {return true;} else {window.open(\'attachments/dvbbs/2004-10/2004102522472561.jpg\');}" onmousewheel="return imgzoom(this);" alt="" /></P>
</DIV>
<P>
<P>老大！使用14500供电，加3.3欧姆电阻限流，那么怎么确保每一个LED的电流是一致的呢？</P>
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