關於 iRobot Scooba 電池問題

想請教各位前輩先進關於 iRobot Scooba 電池的問題。
之前看了版上很多討論關於 iRobot 的部分，所以也利用到美國的機會帶了一組回來，
但是短短不到半年，Scooba 的電池好像就掛了！

我的是 Scooba 380，剛買回來可以洗完一個水箱再多一點〈可是看板上好像可以洗兩個循環？〉，
之後大概兩個星期用一次，之後按照網站上的電池儲存方法，
每次都是先放在座充上充飽電，再放到機器內洗地，
洗完以後再放到座充上充飽電，再另外放著，直到下次要用。

但前兩個星期遇到朋友，他說他們家的是上一代的洗地機，可以洗完兩次。
我就很懷疑為何我的就只能洗一次，因此再把說明說翻出來，
然後按照說明說的方法，改成將電池一直放在洗地機中充電，
沒想到昨天要再洗，居然只洗不到十分鐘就沒電，
再放回充飽電後再洗，還是不到十分鐘，
電池居然掛了！

因此想請教各位前輩：
◎ 前輩的電池都是如何充電或儲存？
◎ 這顆電池還有沒有救〈有朋友說有記憶效應可清除，但他不會...〉？
◎ 是否可跟原廠要求換電池〈年底還會去美國〉？
◎ 官網上的儲存方式跟說明說略有不同，到底哪一個才是最恰當的？

以上再請各位前輩先進指導，非常感恩！

節錄一段官網文字，難道是我會錯意：
Scooba battery performance and tips
Scooba is powered by a rechargeable battery. Scooba's battery will last for hundreds of cleaning cycles before needing replacement.

Battery Storage
For best battery performance, iRobot recommends storing Scooba's battery in a cool, dry place immediately after charging completes. However, if you have received a Scooba osmo and have installed the update in your Scooba, you may allow the battery to remain in the Scooba while connected to the power supply for up to two weeks.

If you do not intend to use the Scooba for two weeks or more, please unplug the power supply, remove the battery from the Scooba, and store ithe battery in a cool, dry place.

If you charge Scooba’s battery in the external Charging Base, we recommend unplugging the power supply and removing the battery once the charge cycle is complete. Store the battery it in a cool, dry area until you are ready to use it.

Battery Life
Fully charge Scooba's battery (3 to 4 hours) before each cleaning cycle. When fully charged, Scooba's battery will always last longer than a full Clean cycle. If you would like to run Scooba more frequently, you can purchase additional batteries and chargers online at the iRobot store. If Scooba cannot complete a cleaning cycle when fully charged, the battery needs to be replaced.

16-Hour Refresh Charge
With regular use, Scooba's battery will fully charge in 3 to 4 hours. In some cases, a longer, 16-hour refresh cycle will be required. This longer charge reconditions the battery when it is depleted, and helps extend Scooba's battery life.

When will Scooba require a 16-hour refresh charge?
• Before you use Scooba for the first time
• When Scooba has been unplugged for an extended period.