可不是空穴來風,因為以前讀過文章,
我並沒有說就壞掉,或丟掉...電解電容要達到壞掉丟掉的存放壽命是10~20年
一般國產電容日期是1年,日製是2年,通電使用可達宣稱的參數
超過三年就建議''re-aging''(活化)通電(電壓慢慢由低到高,直到工作電壓)

網路上爬一下capacitor re-aging,就知道了

http://www.wa4bpj.com/Ham_Radio/Ham...o/capacitor.htm

ALUMINUM ELECTROLYTIC CAPACITOR SHELF LIFE

The following time limits apply to shelf life at 35°C 60%RH for all styles of CDE Aluminum Electrolytic capacitors:
1Year - Will meet initial parameters.
3 Years - Recommend testing before use to determine if re-aging is required to meet initial parameters of DCL (leakage).
4 Years - Re-aging is usually required before use.
5 Years - Typically expect to meet all parameters after re-aging.
10 Years - Typically end of useful shelf life, but subject to many variables.

RE - AGING PROCEDURE

1. This re-aging procedure is performed at room temperature.
2. Connect capacitor to a voltage source with a resistor in series. 10K ohms for 75VDC and below. 100K ohms above 75VDC.
3. Slowly increase voltage to the rated WVDC while monitoring the charge current. Do not allow the charge current to any individual unit to exceed 1mA.
4. After reaching full voltage, continue to apply full voltage for a minimum of 4 hours.
5. Re-test DCL (leakage) after re-aging is complete.