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Apple Battery Charger - Question About Charge

Message #1 - Posted 2012/08/16 - TaliesinSoft

About a month ago I bought an Apple battery charger and several sets of Apple labelled rechargable batteries. Today I replaced the batteries in my Magic Trackpad with batteries that had been recharged. When I then looked at the charge sstatus it was stated that the Magic Trackpad batteries were 60% charged. Is this an indication that the rechargable batteries hold a smaller charge than the "regular" batteries?

James Leo Ryan - Austin, Texas

Message #2 - Posted 2012/08/17 - Salvatore

On 2012-08-17, TaliesinSoft wrote:

About a month ago I bought an Apple battery charger and several sets of Apple labelled rechargable batteries. Today I replaced the batteries in my Magic Trackpad with batteries that had been recharged. When I then looked at the charge sstatus it was stated that the Magic Trackpad batteries were 60% charged. Is this an indication that the rechargable batteries hold a smaller charge than the "regular" batteries?

NiMH batteries are notorious for appearing undercharged. Don't worry about it.

Blah blah bleh...

GCS/CM d(-)@>-- s+:- !a C++$ UBL++++$ L+$ W+++$ w M++ Y++ b++

Message #3 - Posted 2012/08/26 - Kevin McMurtrie

Previously, TaliesinSoft wrote:

About a month ago I bought an Apple battery charger and several sets of Apple labelled rechargable batteries. Today I replaced the batteries in my Magic Trackpad with batteries that had been recharged. When I then looked at the charge sstatus it was stated that the Magic Trackpad batteries were 60% charged. Is this an indication that the rechargable batteries hold a smaller charge than the "regular" batteries?

I wouldn't trust the charge meter too much. The only way to know how much power is in NiMH is to count coulombs (amp-seconds) going in and out. Even the fanciest computerized NiMH chargers often must use the "it's getting hot now" method for ending a charge.

NiMH also temporarily stops working after storage. They'll go back to normal after a few cycles of use.

I will not see posts from Google because I must filter them as spam

Message #4 - Posted 2012/08/26 - TaliesinSoft

On 2012-08-26 08:16:07 +0000, Kevin McMurtrie said:

Previously, TaliesinSoft wrote:

About a month ago I bought an Apple battery charger and several sets of Apple labelled rechargable batteries. Today I replaced the batteries in my Magic Trackpad with batteries that had been recharged. When I then looked at the charge sstatus it was stated that the Magic Trackpad batteries were 60% charged. Is this an indication that the rechargable batteries hold a smaller charge than the "regular" batteries?

I wouldn't trust the charge meter too much. The only way to know how much power is in NiMH is to count coulombs (amp-seconds) going in and out. Even the fanciest computerized NiMH chargers often must use the "it's getting hot now" method for ending a charge.

NiMH also temporarily stops working after storage. They'll go back to normal after a few cycles of use.

The answer is appreciated! I didn't know what NIMH stood for and did a quick Wikipedia lookup at
<http://en.wikipedia.org/wiki/Nickel–metal_hydride_battery> which was quite helpful.

James Leo Ryan - Austin, Texas

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