露營吊扇用電量

手痕計吓數...

我用 3 粒 NCR18650b 直接串聯供電，即係 12v at 3200mmAh

用呢個轉返做 Wh

https://www.rapidtables.com/calc/electric/mah-to-wh-calculator.html

計出 38.4Wh

把吊扇廠方數字係 6W...

即係三粒電加埋可以用大約 6.4 小時。。。

但 18650 唔可以放晒，否則會壞

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因為一 set 電唔夠一晚，所以就買咗呢舊野：

佢標自己有 7Ah，我當佢得 6Ah 都夠一整晚用了，唔使半夜換電，又唔怕用晒整壞！

得閒要差滿電佢試行一晚

不過咁，呢啲野可能會爆炸的，而且原來都唔輕喎，或者咁講 18650 其實都唔重... ?

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昨天充滿電試行一晚, 11:25 開始開住把風扇, 整晚都在轉, 起床時速度感覺略為減慢, 那時是 8:20... 即差不多九小時...

我沒有關上風扇, 後來差不多忘記了它, 直到大約 9:30 看就停了...

即係唔夠十個鐘喇~

Power = Current x Voltage

6W = I * 12

I = 0.5A

當夠佢 10 個鐘, 即係 Q = 0.5 * 10 hour = 5Ah

即係呢舊電頂多得 5Ah, 計埋損耗, 似乎都仲有少少虛標...

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之前我用 3 粒 18650，又帶多 3 粒做後備，總重量係：

159g + 137g = 296g only!!! 容量卻有 6000Ah 以上！價錢好似差唔太多，18650 稍貴少少... 似乎都有啲中伏！或者第日 DIY 一個 12V 六粒 18650 盒仔就最好喇！

Alcos 聚熱水煲

手痕買咗返嚟，重量同個舊煲差不多 (199g vs. 171g)，可能因為轉咗膠蓋，輕返少少。

容量方面，Alcos 係 0.9 升，舊煲就係 ?? 可能係 1.2 升)

因為新買返嚟都要清潔，不如用嚟煲水試吓.... 我各自量咗 750ml 水...

先用舊煲，結果係 3:26 秒滾...

再用新煲... 因為個爐都熱晒，我期望會快好多。。。但結果呢？

3:44 秒先滾！！！

唔係丫嘛，仲慢咗！

可能個火比較勁，無論平底煲，還是聚熱煲都差不多？但都無理由慢咗唧．．．

我諗我要用酒精爐再試一次，我買佢都係因為諗住配酒精爐可以快返少少．．．？？　

Going ultra-light: Verne Trekking Pad and Flextail Gear Helio Camping Light

Saving weight is a never ending process.

Here are my latest upgrade:

The Verne trekking pad is so light that it weights only 244g, and my trusty Alcos mini-table weights 406g...

But notice that it comes with a plastic case which pumps up its weight!  So, better leave it at home.

And next is the Helio is only 42g and it has the size of an egg.  Compare with my 18650 camping light at 159g and another small one from Nature Hike (powered by 3AA battery) at 101g.

Let's have some comparisons:

So, the Alcos is heavier and the Verne is lighter even with the plastic case.  But in fact, the Alchos is both thicker and bigger as you can see below:

The Verne is much faster and easier to setup, and it's lighter... and the Alcos is far cheaper, like one third of the price of the Verne.

Let's go to compare the tent lights:

I've compared all three lights in a dark room.  In terms of Range, the 18650 and the Helio is similar, and the one from Nature Hike is by far smallest.   I am very much surprised since the Helio is much smaller in size!  In terms of brightness, the 18650 one is brighter  at its brightest setting, but the Helio is just a hair dimmer at its burst mode. 

The 18650 one heavier and bigger than the Helio.  The Nature Hike lies between these two, but then the brightness level is no comparison.