今天步飛提出這麼一個問題,容我原文轉載。

買新電話要叉12個鐘??
好老實只係個sales同你講


但如果真係咁緊要, 影響到粒電長期既表現, 點解永遠唔見一本說明書有講?? 完全無講喎!!


甚麼真正造電公司我都未聽過有講!!
你問個sales, 佢都係話"一向係咁講, 上頭叫嘛"
又典解呢?????

相信極多朋友,只要你買一部電子產品,無論是手提電話、手提遊戲機、手提電腦、以至充電池,只要使用內置電池或專用電池,都不時會有個人走出來跟你說:「回家充電充夠十個小時才開始用啊,就算充電器寫明已經充滿,也不要理會它。」可能大家深知這句話未必正確,但卻從來不敢不從。我看你哪敢拿一部蔟新的手機電腦來試,萬一不幸言中,誰來賠我電池?所以大家心裡總有這麼一個謎,但卻一直不知真相。

多年前看雜誌看過一個網站的簡介,雖然從來沒看過,但心中一直掂掛。網站Battery University並不是在某個國家的一所大學,而是一個專門講電池的網站。沒有新產品推介,沒有廣告的網站在近來實屬罕見。原來她是由一家歐洲電子公司Cadex所贊助,該公司專責充電機及電池分析,相當的專業;Battery University標明「Learning the basics about batteries 」,是以教學資訊為本的網站,實在不可多得。

網站由零三年建站,而有關步飛想知道的問題的答案,在當時原來已經在此網有所解答。文章Is lithium-ion the ideal battery?寫明鋰電的特性和優劣之處,以下為部份節錄:

The lithium-ion batteryStorage in a cool place slows the aging process of lithium-ion (and other chemistries). Manufacturers recommend storage temperatures of 15°C (59°F). In addition, the battery should be partially charged during storage. The manufacturer recommends a 40% charge.Advantages* High energy density – potential for yet higher capacities.
* Does not need prolonged priming when new. One regular charge is all that’s needed.
* Relatively low self-discharge – self-discharge is less than half that of nickel-based batteries.
* Low Maintenance – no periodic discharge is needed; there is no memory.
* Specialty cells can provide very high current to applications such as power tools. 

Limitations

* Requires protection circuit to maintain voltage and current within safe limits.
* Subject to aging, even if not in use – storage in a cool place at 40% charge reduces the aging effect.
* Transportation restrictions – shipment of larger quantities may be subject to regulatory control. This restriction does not apply to personal carry-on batteries. (See last section)
* Expensive to manufacture – about 40 percent higher in cost than nickel-cadmium.
* Not fully mature – metals and chemicals are changing on a continuing basis.

樓上紅字的意思,分別指「無需長時間充電,一次正常充電已經足夠」;與及「想電池長壽的話,在不用的時候保持40%電量,並放於陰涼位置,為之最好」目前市面上所買的電池幾乎全部都是鋰電池,要買鋰電以外的電池可以到鴨[bikini]街的五金行找找,聽同事說Sanyo的品質較好,但間中會有假貨。

而Sony Ericsson電話所用的第三代鋰電Lithium Polymer,除了有以上好處之外,電量也較高、體積更小,代價是較少的充電次數。

而上代Ni-MH和Ni-CD電池,都需要在買電之後先充電一個較長時間,是為了令到第一次的「記憶效應」數值比較大。

順帶一提,Lithium不同於Lead/Nickel電池,Lithium電池因無「記憶效應」,充電前並無需要放電,也無需用盡所有電才充電。也就是說,鋰電是可以一邊充一邊用的!「電話正在充電,不能用」的時代早已過去,明白沒有?

更新:後來我再寫了一篇補充的文章,也順道看看吧!
鋰電的疑惑 – 誤解