magic mouse battery level never 100%

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Level 1

19 points

magic mouse battery level never 100%

my freinds bought me the rechargable batteries from the apple store a few months back (like nov 2011) and i fully charge the battery put it into the mouse or keyboard but a full charge is 81%? is this normal? 😕

i downloaded istatpro as i read mention of it in a few threads but that one too says 81%...do i have bad batteries? or is it just the mac not being able to read the battery correctly.

running 27 inch iMac with lion

iMac (27-inch Mid 2011), Mac OS X (10.7.2)

Posted on Mar 13, 2012 8:23 AM

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Answer 1

captfred

Level 7

26,446 points

Mar 13, 2012 1:44 PM in response to Keruvinde

Your batteries are fine. That normal readings for rechargable batteries. Rechargables are 1.2 Volt batteries where non chargables are 1.5 Volt, that's where the difference comes from.

Regards,

Captfred

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Answer 2

X423424X

Level 6

14,271 points

Mar 13, 2012 9:15 PM in response to Keruvinde

Actually there may be something wrong, either with the charger or the batteries. I went through the above reasoning when I first started using the recharables but was correctly pointed out on these forums the percentage is based on power, not voltage.

When I charge my Sanyo Eneloop NiMH (of course 1.2v) I do see 100% charge in the display. Some batteries have a high initial dropoff so maybe yours were 100% but dropped off to 81% by the time you read them (unless it was only a few minutes after you put them in in which case my initial statement stands). Continume monitoring. I suspect you will see the drop off at a much slower rate.

Of course "drop off rate" is a relative term. I use my MM heavily so it only takes me an average of 9 days to get the value below 15%.

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