HK$600 與 HK$50 的更換電池服務主要區別

在香港，HK$600 與 HK$50 的更換電池服務主要區別在於專業設備、保險承諾以及對手錶長期價值的保護。

HK$600：官方服務或高端維修店 (如 Cartier 專門店),  或者一些一等的鐘錶修理店！

這類服務通常包含完整的「電池更換服務」套餐，而不僅僅是換掉那顆電池。

• 防水與壓力測試：更換電池後會同步更換全新的防水膠圈（Gasket），並放入壓力艙進行防水測試。
• 專業工具與零配件：使用原廠指定品牌（如 Renata或Maxell 高規格氧化銀電池，降低電池漏液毀壞機芯的風險。開啟背蓋時會使用專業級螺絲批或壓模機，確保不留下任何刮痕。
• 全方位檢查：技師會檢查機芯的功耗、清潔觸點，並測試各項功能。
• 品牌紀錄與保養：在 Cartier 官方維修中心更換，會有官方紀錄，對於手錶日後的轉手價值（Resale Value）有保障，並通常提供 12 或 24 個月的服務保證。 

HK$50：街坊鐘錶店或商場櫃位 

這屬於「快速更換」服務，通常在 5-10 分鐘內完成。

• 單純更換電芯：服務僅限於拆蓋、換電池、關蓋。通常不會更換防水膠圈。
• 風險因素：師傅可能使用普通金屬鑷子操作，若不慎短路可能傷及石英機芯的電路板。此外，若工具不完全契合（例如使用普通螺絲批開啟 Cartier 特有的微型螺絲），極易在錶殼留下「滑牙」或刮痕，這對名牌錶來說是永久性的美觀損傷。更甚嘅就係因為佢冇開錶嘅專用工具，將錶殼本身嘅平滑面弄花，裝完電之後上返螺絲入邊有罅隙引致漏水囉就係唔防水㗎！
• 無防水保證：多數小店沒有昂貴的壓力測試機。更換後手錶的防水功能會瞬間下降，即使只是洗手濺到水，水分也可能滲入機芯導致生銹。 

對比總結表

項目	HK$600 (官方/高級店)	HK$50 (街坊小店)
電池品牌	瑞士製 (如 Renata/Maxell)	品牌隨機 (可能為平價散裝)
防水處理	更換防水膠圈 + 壓力測試	沿用舊膠圈，無測試
外觀保護	專用模具，保證零刮痕	手工具操作，有刮花風險
售後保證	官方 1-2 年保證	離開櫃位後通常不予負責
適合對象	Cartier，ＡＰ手錶	平價石英錶、電子錶

如果您擁有的是 Cartier，強烈建議選擇官方或專業維修中心。一次不當的廉價更換如果導致機芯腐蝕或錶殼受損，之後的完全維護服務（Complete Service）費用可能高達 HK$3,200 起。

Ｐａｕｌ　 

The Quartz Movement of two Watches: Longines and Timex

                                                                  Timex Movement

Longines Movement

As a Mechanical Watch collector, I hardly buy any Quartz watch , in the past year I had bought an AP Royal Oak Two Tone with Diamond bezel, two Rolex OysterQuartz, Seiko, Tissot Touchand Sunnto Trekking Watch and a Piaget. Other than these, I use only mechanical Watch.

A Quartz watch consists of :
A microprocessor chip, a pieces of capacitor (as a component to form the oscillation with the Quartz) a trimmer , a couple of resistor a coil for converting the timing signal into pulse to driver a few gears , a PCB board and a battery Cell.

Many people think that all Quartz watches look the same as the cost of a low cost Quartz movement can be as low as USD$2.00 now. For certain High quartz Swiss Quartz movement, the cost is much higher as the use better material and design. Rolex has the best design and likely the highest Cost of a Quartz movement, up to $300.

I have taken out two very old pieces of family watch Timex and Longines that have been using almost 30 years. There seems no difference between two watches as people judges Quartz base on price.
From outlook there is hard to tell the difference of the movement except the Longines is much thinner about 2.5mm whereas the Timex is about 8mm that tells you the difference in the cost already.

As The Timex has a much bigger engine, much bigger Coil, Bigger gears, and then much higher power consumption, this required a much bigger battery cell. Even though we can see the movement is made with a more complex process, every component is dispensed with a kind of industrial resin to hold the component in position, even onto the coil. Nowadays almost no one will dispense any glue, adhesive whatever on the PCB (Printed Circuit board) component.

Look at the Timex Microprocessor, it is using SC70 package, that is a package IC contain few more complex manufacturing process. It used 99.99% gold wire inside the chip.

That could be a high cost in the year 1986, nowadays almost no one uses Package IC for the microprocessor, they use COB (chip on board) just use some glue to stick the IC Chip

Onto the PCB, cure it and then use thin Aluminum Wire of 1.25 mil (1 mi is 1/1000”) diameter to connect the chip with the PCB, it is done by an Automatic Aluminum Wire bonder.

Note that Gold wire interconnect is much more reliable than Aluminum, whereas Aluminum wire is much cheaper in cost.
As for the Longines, we can see they use heavy plated PCB, battery contacts, even screws!
The Aluminum mechanical plate guilloched. There are 7 jewels. The PCB is face up with additional protection of the circuitry, and the coil is made with very fine wire.

Since they use 7 jewels, the movement as a much lighter friction, thus a smaller coil with thinner wire will be able to drive the circuit, this is a great power saving for the battery. Of course a smaller battery cell can do. So with all this design, the Longines is very thin. The Timex is very thick.
The Longines requires battery changes in 7 years, the Timex is about 2 years. Don’t forget these are made in 1986. When you buy a Swiss quartz watch, you may know they have made a lot of effort to ensure that the watch can be used for many years with very good timming accuracy.

HK Snob