How to Make a 4.5v Replacement Battery for a Mac Plus. It helps to have a dead 4.5 v cell to get the length right but it's darned close to 2". You need three new AAA alkaline cells, some insulated wire, larger gauge than phone wire but smaller than lamp cord and some transparent tape. You will need to quickly solder two small wires to the cells with a HOT iron. Everything else is easy.
Start by taping the three cells together in the middle so that two make up the 2" length with a positive at one end and a negative at the other. The third is nestled exactly mid-way between the two so that looking at them from the ends, you have a triangle. The third cell should have it's ends opposite to the polarity of the closest cell end to it. This would be a lot easier with pictures. In other words, each end of the center cell should be opposite in polarity to the closest end of the cell next to it. Next, put a small amount of soldering paste on the all battery ends except for the extreme contact ends. Cut two short pieces of insulated wire, roughly 3/8" long and strip about 1/8" of insulation from each end. Put a little soldering paste on each end. with a HOT soldering iron, tin the four battery ends that are closest to the inside, leaving the extreme or contact ends alone. Try to do this quickly so the cells don't heat up too much. Using fine nosed pliers or forceps to hold the wires solder them to both ends of the inside pairs of cell ends so that you have three cells wired in series. This should make sense when you are looking at it. When everything is soldered well, put some transparent tape over the soldered ends to prevent a short. wrap some more tape around the pack and you are done. You should be able to fit the pack inside the holder if you didn't use too much tape. In my Plus, the lower, negative end is well inside the holder while the upper, positive end just contacts the spring connector. The hatch bulges slightly, holding the pack securely in place. Good luck and let me know if you need further instruction. Best, Hardy -- Compact Macs is sponsored by <http://lowendmac.com/>. Support Low End Mac <http://lowendmac.com/lists/support.html> Compact Macs list info: <http://lowendmac.com/lists/compact.shtml> The FAQ: <http://macfaq.org/> --> AOL users, remove "mailto:"; Send list messages to: <mailto:[EMAIL PROTECTED]> To unsubscribe, email: <mailto:[EMAIL PROTECTED]> For digest mode, email: <mailto:[EMAIL PROTECTED]> Subscription questions: <mailto:[EMAIL PROTECTED]> Archive:<http://www.mail-archive.com/compact.macs%40mail.maclaunch.com/> Using a Mac? Free email & more at Applelinks! http://www.applelinks.com
