Old 05-30-01, 12:13 AM
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I have a computer memory battery which is 3.6 v 500 mAh.Can a 3.6 v 600 mAh Battery be use as a substitute? What does 500 mAH and 600 mAh mean,and why would you have to use a certain mAh in certain application?
Old 05-30-01, 06:45 AM
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Yes, you can use it. Just make sure it fits, because the 600mAH battery could be a bit bigger. The 600mAH rating indicates its total energy capacity, so it could provide a current on 600 milliamps during an hour before going dead. A proportionately lower drain rate thus increases its life. Computer memory chips used for the real time clock and the setup information only draw mere microamps, so the battery lasts for years. Those lithium batteries are used because they typically have a 10 year shelf life, so they won't go dead on you simply by virtue of time. Rechargeables on the other hand, go dead in as little as 3 months, even if you do not use them at all so they need regular recharging.
Old 05-30-01, 11:06 AM
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The "mAH" refers to mili-Amp-Hours. As guy indicated it is a rating of how much energy, in amps, is stored in the battery. Except for automotive batteries this is the battery industry's standard rating unit. The 600 mAH battery will supply 600 miliamps for one hour until the voltage drpos to a specified level below what is considered useful to the appliance, or what most people call "dead", even though that isn't quite true.

If your computer draws 300 mAmps, for example, this battery will last 2 hours. If the computer draws 1200 mAmps it will last 1/2 hour.

If you aren't keen on mili and micro prefixes, your 500 mAH battery is 1/2 an amp-hour, or 0.5 AH. The 600 is 0.6 AH.

Hope that helps. Probably more information than you wanted to know. You can go ahead and hit the reset button now.


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