mac batteries, lithium batteries, alkaline batteries, clock batteries

We feature the best prices for PRAM/clock batteries that fit Macintosh computers. We also carry high quality replacement batteries that fit the MacBook Pro, MacBook, iBook and PowerBook computers! We discount for schools and quantity buyers, call for a quote. We sell batteries that you find in all Apple Macintosh computers and compatible systems, including UMAX, PowerComputing, Motorola and other Mac clones. We specialize in batteries for Mac Computers and buy in bulk, we are able to offer you the best prices! Our Mac Batteries are fresh and kept in a special battery storage facility and our low price includes shipping! We have illustrated instructions available for Apple iMac Trayload and Slotload systems, available on request with purchase. Click Here to review MacBook, MacBook Pro, PowerBook and iBook batteries! Click Here to ORDER PowerBook, MacBook, MacBook Pro, and iBook batteries! We now have backup batteries for iMac G5's INTEL iMacs, Mac Mini's! G5 Towers, Mac Pro Towers

 Click here to go right to the battery category and order now!

Call TOLL FREE 1-877-639-1543 9-6 CST M-F

Tech Support Line - 1-405-601-5288 9-6 CST M-F - FAX 1-405-445-0796

ABLE Mac Clock Battery 3.6V Lithium 1/2 AA Click Here to order now!

Computer Listing for ULTRALIFE 3.6V 1/2AA Size Battery

  • iMacs G3 & G4 ALL
  • Power Mac G3, & G4 ALL
  • Power Mac G5 (G5 - 1.6, 1.8, Dual 1.8-Dual 2.0) (800, 900, or 2x1.0 GHz system bus)
  • Power Mac G5 (June 2004) (Dual 1.8, Dual 2.0, Dual 2.5)
  • Power Mac G5 (Early 2005) (Dual 2.0, Dual 2.3, Dual 2.7)
  • eMacs ALL
  • Power Mac 6100 Series ALL
  • Power Mac 7100 Series ALL
  • Power Mac 7200-7215
  • Power Mac 7300-9600 ALL
  • Macintosh Workgroup & Network Servers ALL
  • Mac Classic I & II
  • Mac Color Classic I & II
  • Mac IIx, IIcx, IIci, IIsi, IIvi, IIvx, IIfx
  • Mac LC, LC II, LC III & III+
  • Mac LC 475, 520, 550
  • Macintosh TV
  • Performa 200-560, 600 & 600CD
  • Performa 6100 Series ALL
  • Mac Quadra (ALL except 630)
  • Mac Centris ALL
  • Powerwave, Powertower, Powercurve, Powercenter ALL
  • Umax J700, S900, S910

G5 Tower battery, iMac G5 battery, Mac Mini batteryClick Here to order now!

Coin Cell Lithium - Equivalent to 922-6476. Meets or exceeds specifications.

  • Mac Mini ALL
  • iMac G5 ALL
  • iMac INTEL ALL
  • Power Mac G5 (Late 2005) Single 2.0, Single 2.3, Dual 2.5
  • Power Mac G5 (Late 2004) (Single 1.8 Ghz) (600MHz System Bus)
  • Mac Pro Towers ALL

4.5 Alkaline Battery for Mac computers Click Here to order now!

The original style of this battery is no longer being produced. We were able to locate a different improved version that fits and works perfectly. It even had the velcro hold down just like the original. This new style is factory fresh!

Computer Listing for 4.5V ALKALINE Batteries

  • Mac LC 575-630, 630 DOS Comp.
  • Performa 575-588 incl. CD models
  • Performa 630-640 Incl. CD models
  • Performa 5200-5440 All
  • Performa 6200-6420 All
  • Mac Quadra 630
  • Power Mac 4400-5500 All
  • Power Mac 6200-6500 All
  • Power Mac 7220, 7220 PC Comp.
  • Twentieth Anniversary Mac
  • Power Computing PowerBase All
  • Motorola StarMax 3000, 4000 Series
  • Umax C500, C600, J710

Still not sure which battery you need? Give us a call TOLL FREE 1-877-639-1543 9-6 CST M-F and we will be glad to help you place your order for the correct battery!

How To Change Your 3.6V Clock Mac Battery

How to change our your Mac battery

How to change out your Apple Macintosh pram battery

Changing out a battery is not difficult on most Mac systems. Simply pry off the retainer and pull the battery out.
Reverse the procedure with the new battery making sure the + is positioned correctly.

Restart your system and reset the date and time and other control panel settings as needed. Note 4.5V Batteries are small square and black. They are stuck down with velcro. Simply pull up the old battery and unhook the cable. Reverse the procedure. There is only one way the cable plugs back in.

We have illustrated instructions available for iMac Trayload and Slotload systems, available on request with purchase. Call and ask about iMac G4 Flat Panels. We now have backup batteries for iMac G5's, Mac Mini's! G5 Towers & Mac Pro Towers.

How To Change Your Coin Cell Clock Battery

remove your computers coin style clock battery

install a clock or button style clock battery

After powering down and unplugging your system, open your computer and locate the battery on the motherboard. It may be easier to set the unit
on it's side.Slide the battery out from the holder. A small screwdriver may help but use caution, the pro's use a small plastic non conductive tool.
A plastic knife or ice cream stick would be a decent and safer substitute for a removal tool.

IMPORTANT: Slide the new battery in, making sure the + POSITIVE symbol shows up. While extremely rare, it is possible for an improperly installed battery to explode.

Button up and restart your computer. Using preferences, reset the clock and check your other settings.

Batteries contain chemicals that may be harmful to the environment. You should dispose of used batteries at one of the recycling centers.

Read about proper battery disposal

Once you've replaced the battery, you will want to reset several settings. If you're on a network, you'll want to open the Chooser and enable AppleTalk. Note some Macs may not support all these control panels (preferences in OSX). These are the control panels you'll need to use:

  1. Startup Disk. Always reset your startup disk. Your system may not boot well or give you the flashing question mark if it gets confused.
  2. Date & Time. First, choose your time zone, then set the date and time.
  3. Memory - Mac OS 8.5 and later will usually set this automatically. Set your cache to a Meg if you have plenty and 1 meg over on virtual.
  4. Network or AppleTalk. If you're on a network that isn't LocalTalk, you will need to reset your network connection on any Mac with a LocalTalk port.
  5. Mouse and Keyboard. You'll need to reset the mouse tracking and double-click speeds, as well as setting the keyboard delay and repeat.
  6. Energy Saver or Auto On/Off. Energy saving settings, power-up time, etc. are stored in PRAM and need to be reset.
  7. Monitors and Sound or Monitors & Sound. You need to reset speaker volume and monitor bit-depth -- and possibly resolution.
Need help with your hardware? Read Bob's Mac Tech Tips

Beware of Substandard Batteries

I was looking at some of the pram batteries sold by our competition. No one sells batteries for less than we do, and no one sells fresher batteries than we do. I saw a couple who advertised lower prices but by the time you paid shipping and handling you end up paying substantially more. What really bothers me though is some of these low priced specials were lower milliamp batteries. Before buying any 3.6 V Lithium Battery that fit in most of the Macs make sure the batteries you are getting are 1200mah. Remember we import these batteries direct and they are not made before we order. While lithium batteries have a long shelf life, most batteries in the states these days are several years old. Ours are no more than 4 months from the date they were created.

When pricing laptop batteries you should always compare the milliamp hour rating (shown as mAH). Sometimes a bargain is not a bargain if it doesn't last long in your laptop. More is always better.

We are distributors for the ULTRAlife brand of high quality replacement 3.6V Lithium Battery for the Macintosh! We purchase these batteries factory fresh and have them airfreighted in quantity. The same high quality long lasting and powerful 1200 mAh and our same low $7.88 price includes domestic shipping. Call for quantity discounts. These are exact replacements for Tadiran, Saft, Maxell, Rayovac etc. and meet or exceed OEM specifications.

ULTRAlife 3.6V 1/2AA Size Battery

  • Features:  U.L. Recognized MH18384   ISO 9001 Approved
  • Specifications: @232 & 2.0V Cut-off
  • Open Circuit Voltage(Nominal) : 3.6V
  • Standard Discharge Current: 0.5mA
  • Max. Continuous Current: 5.0mA
  • Max. Pulse Current: 50.0mA
  • Capacity: 1,200mAh
  • Weight: 9.2g
  • Operating Temperature Range: -55 ~ +85
  • Reaction Surface Area: 7cm2

Clicking on any link below will take you to the store. Select the battery category when you arrive and place your order securely.

3.6 Volt Lithium Battery in its installed location

Mac clock battery in its native habitat

Has your system recently lost its mind? If your clock is not keeping time you need to immediately replace your clock battery. Failure to do so can cause drive errors and loss of data. Lithium Batteries last 3-5 years, and the Alkalines last as little as a year up to 2 years. These are exact replacements for Tadiran, Saft, Maxell, Rayovac etc. and meet or exceed OEM specifications.

Click Here to review MacBook, PowerBook and iBook batteries!

Click Here to ORDER batteries now!

We carry much more than batteries in our online store. Visit for all your Mac accessory needs!
Order securely from a 31 year old company who specializes in quality refurbished Mac and Mac clone computers. We offer a 30 day warranty on all batteries and FREE SHIPPING in the continental U.S.

We accept SCHOOL and Institutional P.O.'s!
We offer quantity discounts! Call or
EMAIL US for quantity pricing!
TOLL FREE 1-877-639-1543 9-6 CST M-F
Business Line 1-405-601-5288 9-6 CST M-F
FAX 1-
Tech Support Line - 1-405-601-5288
9-6 CST M-F


Order securely from our Mac based and hosted systems. We NEVER give out email or other information and your email is used only to send you confirmation.

Need more than just batteries? Visit Operator Headgap Systems Store for new and used systems and components.

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