Macintosh Portable Battery Rebuild

[mcdermd]

That's the same pack that's in my rebuild.

 

[uniserver]

i must have something else wrong... this new battery is doing the same as the old one.

Basically the hard drive will only work if its plugged in.

if the HD does work off the battery it will only run for about 5 to 10 minutes max.

something aint right and its kinda pissin me off.

any ideas?

well in some google searches, looks like my issue might be a little more serious then i thought.

I guess the back-lit portable's have voltage regulator IC issues...

because it clearly states in other threads the hard drive should spin even at battery voltages of not less then 5.7 VDC.

viewtopic.php?f=10&t=13918

viewtopic.php?f=10&t=12145

viewtopic.php?f=10&t=10569

 

[Macdrone]

I bought the three separate batteries and soldered them together. Exact fit batteries. When my backlit unit gets here next week ill recap it and tell you if I have the same issue. I know the hard drive failing and backlight decrease battery life but mine goes 16 hours use. (Without backlight).

 

[uniserver]

wether your works ... or doesn't work isn't going to help me.

I already know this integrated cyclone replacement works great, because mcdermd has the same one. He's been running it for more then 5 years now in his portable.

Besides my original battery solution should work fine because the HD should spin all the way down to 5.7 volts, My issue is a onboard voltage regulation.

But right now i'm not tearing this thing down again. Its going to remain in its state until, I get some expert advice from someone that has dealt with this voltage regulation issue. So far in the Threads listed, is no known solution for the back lit version...

 

[Trash80toHP_Mini]

Batteries are engineered for specific duty cycles. If yours is indeed a replacement battery for an exit sign, it probably expects a low power continuous charge and then a low power drain requirement. The Portable battery is likely designed for a bit deeper discharge at startup and a higher power drain while under load.

That's a WAG based upon a rudimentary understanding of the differences between Marine and Automotive batteries, BTW.

 

[Macdrone]

He got a cyclone set in there trash.

Uni I was hoping that I can help you with the issue or if we have the same issue I can help find a common failure point.

 

[uniserver]

And I appreciate that!

However, the hard drive staying on when running from battery issue (only with the back-lit portable) is the regulators, they have already talked about voltage regulator IC issues in the other threads I have listed above.

I hope yours does not have the same issue... because it sounds like there is no fix.

I guess if I converted mine to dual floppy, it would work out just fine. after all 6.0.8 boots up pretty fast from floppy.

 

[Trash80toHP_Mini]

He got a cyclone set in there trash.

OOPSIE, I missed that part of the thread. :-/

 

[mcdermd]

I don't meant to state the obvious, but the HDD will spin down for power-saving reasons after a period of time. Is it not spinning up again when you need it?

 

[uniserver]

Yes your are correct.

in my situation, the HD will run for some odd minutes between 5 or 10 minutes power down and will try to power back up , but just will not spin up it will even make noises as its trying but, not successful.

however if i leave it plugged in, the hard drive spins up and down, with power management as intended.

 

[mcdermd]

Okay. I just wanted to be sure that we were all on the same page here.

 

[aplmak]

Does anyone know if this item EnerSys Hawker Cyclon 0809-0012 6v-5.0ah Battery. 6v 5ah Monoblock will work ok on the Mac Portable as a replacement? I'm thinking it might just fit in the can of the old battery.. You can find this on ebay.. Anyone know if it will work ok??

Thanks

 

[Macdrone]

It meets the requirements I'm not sure it fits inside the old case. I bought new old stock and made exact rebuild.

 

[FireBlade93RR]

the ribs that go along the edge are a bit too thick and need to be removed to fit inside the battery housing, but otherwise it works fine, i used one of those for my 5126

 

[FireBlade93RR]

8 of them,

i used a dremel