ANSWERS: 6
  • they discharge while not being used so be sure to charge right before you place them in whatever receptacle. not very long in my opinion but somehow still worth doing.
  • I had C cells in regular use that were good for ten years.
  • depends on the kind of battery and what you are using them in.
  • The life of rechargeable batteries can vary between several weeks to several years, depending on the type of battery, the way the batteries are charged and discharged, and the conditions they are used in. NiCd's & NiMh; - Extreme high/low temperatures often reduce the life of rechargeable batteries. - High discharge currents can also reduce the life. - Whilst extremely slow discharges can cause the 'memory effect' to appear amongst nickel type rechargeable batteries (NiCd nd NiMh - yes NiMh's still have the memory effect but the effects are often not as severe as those experienced by NiCd's). - High charge rates, above the rated charging current can also reduce life, the best charge rate in my opinion is 0.5C (where the charging current is half that of the battery's capacity: 500mA for a 1000mAH battery). - And again, slow charge rates can cause the 'memory effect' amongst nickel based batteries. - To prevent the 'memory effect', nickel based batteries should only be charged once they are fully discharged (i.e. below 1v per cell). - Finally, NiCd's and NiMh's should not be left on trickle charge for more than 24hrs. Nor should they be overcharged. Leads Acids; - Lead acids, on the other hand, should be kept in a fully charged state. Therefore should be charged whenever the battery is not being used. - High Temperatures above 35'C can reduce the battery life significantly. - Charging current should not be more than 0.25C (one quarter of the battery's capacity, i.e. 1.5A for a 7AH battery). - Lead Acids must never be discharged below 1.5v per Cell (9V for a 12V battery and 4.5V for a 6V battery). - Lead Acids can be left on trickle charge for an infinite period of time, to keep the battery fully charged. - Should a battery be left in a discharged state for a period of time. Significant capacity loss can ocurr, due to a process called Sulphation. Batteries in this state can sometimes be recovered using a Desulphator, but results vary. Li-Ion and Li-Polymer; - Should never be overcharged, as this can lead to fires and explosions. - Should never be left to discharge below 2.5v a cell. - Finally, these type of batteries, don't like to be left in a fully charged state for long periods of time. Therefore, if you're not going to use a device using a rechargeable lithium battery, like an iPod, Mobile phone or Laptop, for long periods of time; to prevent capacity loss, the battery should be stored in a 40% charged state. Following these guidelines will lead to extended battery life and will prevent capacity loss. Hope this helps.
  • The life of rechargeable batteries can vary between several weeks to several years, depending on the type of battery, the way the batteries are charged and discharged, and the conditions they are used in. NiCd's & NiMh; - Extreme high/low temperatures often reduce the life of rechargeable batteries. - High discharge currents can also reduce the life. - Whilst extremely slow discharges can cause the 'memory effect' to appear amongst nickel type rechargeable batteries (NiCd nd NiMh - yes NiMh's still have the memory effect but the effects are often not as severe as those experienced by NiCd's). - High charge rates, above the rated charging current can also reduce life, the best charge rate in my opinion is 0.5C (where the charging current is half that of the battery's capacity: 500mA for a 1000mAH battery). - And again, slow charge rates can cause the 'memory effect' amongst nickel based batteries. - To prevent the 'memory effect', nickel based batteries should only be charged once they are fully discharged (i.e. below 1v per cell). - Finally, NiCd's and NiMh's should not be left on trickle charge for more than 24hrs. Nor should they be overcharged. Leads Acids; - Lead acids, on the other hand, should be kept in a fully charged state. Therefore should be charged whenever the battery is not being used. - High Temperatures above 35'C can reduce the battery life significantly. - Charging current should not be more than 0.25C (one quarter of the battery's capacity, i.e. 1.5A for a 7AH battery). - Lead Acids must never be discharged below 1.5v per Cell (9V for a 12V battery and 4.5V for a 6V battery). - Lead Acids can be left on trickle charge for an infinite period of time, to keep the battery fully charged. - Should a battery be left in a discharged state for a period of time. Significant capacity loss can ocurr, due to a process called Sulphation. Batteries in this state can sometimes be recovered using a Desulphator, but results vary. Li-Ion and Li-Polymer; - Should never be overcharged, as this can lead to fires and explosions. - Should never be left to discharge below 2.5v a cell. - Finally, these type of batteries, don't like to be left in a fully charged state for long periods of time. Therefore, if you're not going to use a device using a rechargeable lithium battery, like an iPod, Mobile phone or Laptop, for long periods of time; to prevent capacity loss, the battery should be stored in a 40% charged state. Following these guidelines will lead to extended battery life and will prevent capacity loss. Hope this helps.
  • If the batt. is NiCad, it should last pretty long, but you should recharge it after you use it, even if you dont plan to use it for a while, and try not to charge it when the battery still has energy left.

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