Anatomy of an Apple battery

Summary:Ever wonder what's inside your Apple battery pack? It turns out that they're not that complicated inside, but it's amazing how much power these little cluster of cells can hold.

14 mAh 496 load cycles.pngEver wonder what's inside your Apple battery pack? It turns out that they're not that complicated inside, but it's amazing how much power these little cluster of cells can hold.

I took an iBook G3 (dual USB) battery apart on the advice of Coconut Battery which told me that after 496 load cycles, this battery had seen better days.

As you can see in this screen shot, the battery had 14 mAh Battery Capacity left compared to an Original Battery Capacity of 4000 mAh. In addition to lacking capacity the battery pack wasn't charging.

Time to take it apart!

Click through for a photo dissection of an Apple battery pack...


sony-ibook-battery-7.jpg

Figure 1: An iBook G3 rechargeable battery.

 


sony-ibook-battery-6.jpg

Figure 2: A view inside with the cover removed.


sony-ibook-battery-5.jpg


Figure 3: The underside of the exposed cells.

 

 

sony-ibook-battery-4.jpg

Figure 4: The top of the battery pack without the case.


sony-ibook-battery-3.jpg
 

Figure 5: The front of the PCB with the Foxconn battery terminal block.

 

sony-ibook-battery-2.jpg
 

Figure 6: The rear of the PCB

 

 

sony-ibook-battery-1.jpg

Figure 7: A single Sony Fukushima US18650GR cell. 

Apple uses six Sony Fukushima US18650GR cells in the iBook battery pack. Each cell has a 18mm diameter and is 64.7mm long. Each cell is rated at 3.7V, 1800 mAh.

In order to get into the battery pack you'll need a special "3 wing" screwdriver, Usually a good small flathead works fine. Once the screws are removed the case is held on with some glue and requires some effort to remove. Once the case has been opened - be careful. The batteries contain a fair amount of electricity and shorting the terminals can easily cause a fire.

If you need a replacement battery for an older Mac, only purchase a new OEM battery from someone like Tekserve. As a licensed Apple Authorized Service Provider (AASP) they have access to Apple "service parts" like batteries for as long as five years after the product was announced - the legal limit for a California-based company.

Topics: Hardware

About

Jason D. O'Grady developed an affinity for Apple computers after using the original Lisa, and this affinity turned into a bona-fide obsession when he got the original 128 KB Macintosh in 1984. He started writing one of the first Web sites about Apple (O'Grady's PowerPage) in 1995 and is considered to be one of the fathers of blogging.... Full Bio

zdnet_core.socialButton.googleLabel Contact Disclosure

Kick off your day with ZDNet's daily email newsletter. It's the freshest tech news and opinion, served hot. Get it.

Related Stories

The best of ZDNet, delivered

You have been successfully signed up. To sign up for more newsletters or to manage your account, visit the Newsletter Subscription Center.
Subscription failed.