The "Memory Effect"
  "Memory Effect" is a condition of reduced battery performance (and eventual failure) due to a battery only using those cells that are fully discharged and charged on a regular basis. In other words, if on a regular basis a NiCd or NiMH battery is only partially discharged before being recharged, it " forgets" that it has usable capacity to further discharge all the way down. The result is degraded battery performance and shorter battery life because the battery is using less than it's true full capacity. Li-ion batteries do not develop the "memory effect". NiMH batteries, while considerably better than their NiCd counterparts, are prone to developing "memory effect." However, proper care and conditioning over the life of a NiMH battery will significantly reduce the potential negative impacts.

• Properly "condition" (fully charge/discharge for first 3 cycles) the battery when it is new.
• Keep the battery and the contact terminals clean.
• void exposing the battery to extreme heat and cold.
• Use the battery. If possible, avoid letting your battery sit dormant for long periods of time.
• Use only the phone options and accessories that you really need.
• Charge and re-condition a battery after an extended idle period.

• Toss, drop, or otherwise abuse the battery.
• Short-circuit the battery.
• Open and expose the cell contents.
• Modify the battery casing and/or housing.
• Allow the battery to be exposed to rain or excessive moisture.
• Incinerate a battery. Properly dispose of a used battery.

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