I have a Apple Mighty Mouse, and I want to use rechargeable batteries, but I read somewhere on such a device I should only use Eneloop rechargeable batteries as they hold a charge when the device is not in use.

Is this a correct statement? I don't understand how one battery can hold a charge when the device is not in use, and another one cannot.


1 Answer 1


Different types of batteries have different discharge rates when not in use due to a number of factors including type of battery, state of charge, charging current, ambient temperature and other factors (See here for more on self discharge).

I previously confused ESR with self discharge, where ESR determines the maximum current the battery can provide. For more information on the characteristics of rechargeable batteries.

According to the Wikipedia page on Eneloop batteries, they have a low discharge rate, making them better for items that are used infrequently.

Also below is a chart that was provided to me by a professor previously that shows some of the advantages/disadvantages of different types of batteries:

enter image description here

  • \$\begingroup\$ So would you say for things that are in use say 8 hours out of a 24 hour day (remote, mouse, etc) eneloop batteries would be recommended? \$\endgroup\$
    – Steven
    Commented Jan 2, 2015 at 14:28
  • \$\begingroup\$ For items with that amount of use, I would think you wouldn't really see the effects of the ESR and the eneloop should be just fine. \$\endgroup\$
    – TronicZomB
    Commented Jan 2, 2015 at 14:29
  • 3
    \$\begingroup\$ You seem to be confusing ESR and self discharge, which are two quite different things. Self discharge would be more of a parallel or shunt resistance - norton, not thevenin. Series resistance only comes into play if something (like a load) is completing the circuit. \$\endgroup\$ Commented Jan 2, 2015 at 21:06
  • \$\begingroup\$ @ChrisStratton upon your advice I read more and believe that I have corrected my mistake. Thanks. \$\endgroup\$
    – TronicZomB
    Commented Jan 2, 2015 at 21:23

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