How to test battery is bad

My battery was bad today and it's wonton three year warranty. Voltage is 6.7v。 Sams club claim they have to test it in their charger because Rotary may damage the battery。 it takes 5 min to one hour. is it true。

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Anyone can help? -讓股票飛- 給 讓股票飛 發送悄悄話 讓股票飛 的博客首頁 (0 bytes) () 08/17/2015 postreply 10:56:02

有可能,你也可以去AutoZone 測試一下 -soccer88- 給 soccer88 發送悄悄話 soccer88 的博客首頁 (0 bytes) () 08/17/2015 postreply 10:58:02

Yes, when voltage drop <11.7V, the caocity is 0 -方宜- 給 方宜 發送悄悄話 (307 bytes) () 08/17/2015 postreply 11:47:00

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