What is the expected life of an APC UPS battery?

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在APC 的廣告email發現了這個訊息，貼在這邊當作自己的memo.

Q:What is the expected life of an APC UPS battery?

A: All APC batteries should last three to five years. Below are some guidelines to ensure optimum life expectancy:

-> 這還真的只撐了三年

1. Make sure that the APC UPS battery is kept in a cool, dry location with plenty of ventilation. Ideally, the temperature where a UPS is kept should not exceed 75° F (24° C). Also, for ventilation purposes, leave roughly one to two inches on each side for proper airflow.

->這點大概沒有達到吧，台灣的夏天，室內應該也有30°C吧～晚上是會開冷氣，因為我也受不了那麼熱。

2. Only perform runtime calibrations on the UPS one or two times a year, if necessary. Some of our customers want to check their systems to verify that their runtime is sufficient. However, consistently performing these calibrations can significantly decrease the life expectancy of your APC battery. Click here for more information on runtime calibration.

->這大概就是Leon跟我說得需要電池放電，一來可以知道系統在斷電的時候可以撐多久，二來也讓電池有個放電、充電的過程。APC建議是一年大概兩次，所以我大概也就半年放電一次好了。

3. Do not store APC batteries for extended periods of time. New batteries can be stored for 6 to 12 months. After this period, the battery should be used or it will lose a great deal of its charge. It is not advisable to store batteries that have already been in use.

->我應該不會買額外的電池來存放。

4. Do not exceed 80 percent of a UPS unit’s rated capacity due to the reduction in run time. When loads increase, runtime lessens. In the event of a power failure, a UPS loaded to full capacity will drain and discharge it’s battery quickly and will lessen the life expectancy.

->這個也許該注意一下，現在是兩台機器插在UPS, 還有giga switch and LCD monitor，也許只需要把server 插進去就好了。