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Macintosh Portable replacement battery
Posted by: falen5 on 2019-03-06 10:01:43
Trying to find a good replacement to fit inside the old battery casing.

Cant find one that fits

Found loads that fit but are 3 amp , 2 amp. It has to be a 6volt and 5 amp ?

Anyone got a suggestion to one that will work and fits in the original battery case?
Posted by: falen5 on 2019-03-06 10:10:04
i should of kept looking a bit longer.

here is a thread for anyone else
Posted by: falen5 on 2019-03-06 10:17:27
Found this one.

it will fit and its 4.5 ah

Is this a winner for a replacement folks?

https://www.ebay.ie/itm/ULTRA-MAX-6V-4-5AH-as-4AH-Sealed-Battery-for-Security-Alarm-Burglar-Alarm/121367260751?hash=item1c420d6e4f:g😛oUAAOSwd4tUBIEV
Posted by: LaPorta on 2019-03-06 11:14:32
This is what I used. Basically a direct replacement:

https://www.batteriesplus.com/battery/sla-sealed-lead-acid/6/hawk0809=0012
Posted by: falen5 on 2019-03-07 06:34:44
thanks laporta

ive already ordered the one i linked to - its smaller than the battery housing, but sure well see how it goes

cheers man
Posted by: LaPorta on 2019-03-07 09:16:34
Let me know how it goes. I ordered one that was 6A, 5AH...and apparently it did not have enough effective peak voltage (how quickly it discharges) to run the machine...so they are not all the same. I do hope it works for you...it was difficult for me to figure out.
Posted by: falen5 on 2019-03-15 19:53:08
Heres what i used LaPorta

And i have been running the machine for 3 hours. Hard drive running, contrast at full , sound at full - running apple analytics , benchmark tests - trying to load the battery

Ran it for 20 min - battery level drops, plugged in charger, charging began - charging got to 100% and the charging icon disappeared.

After 3 hours , removed the battery to check for heat , or anything crazy

All seems good. Battery was stone cold!!

Happy so far.

Heres a link to the battery on ebay.

https://www.ebay.ie/itm/ULTRA-MAX-6V-4-5AH-as-4AH-Sealed-Battery-for-Security-Alarm-Burglar-Alarm/121367260751?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2060353.m2749.l2649

The Portable appears to be functioning perfectly.

Here's my crude attempt.

a.jpg

b.jpg

c.jpg

d.jpg
Posted by: spiceman on 2019-06-16 06:47:37
Has any one looked toward using Lithium Ion motor cycle battery.  Similar to this LFX18L2-BS06  https://shoraipower.com/lfx18l2-bs06-p98       

I think this one is just a tad big.  But these compared to AGM are much lighter and provide better power. 

I had though on building a Li-on cell pack inside the case but need to research if any internal circuitry for cell protection is needed.
Posted by: AlpineRaven on 2019-07-06 17:39:46
Has any one looked toward using Lithium Ion motor cycle battery.  Similar to this LFX18L2-BS06  https://shoraipower.com/lfx18l2-bs06-p98       

I think this one is just a tad big.  But these compared to AGM are much lighter and provide better power. 

I had though on building a Li-on cell pack inside the case but need to research if any internal circuitry for cell protection is needed.
The only concern I have is if the power management in Mac Portable can cope with that type of battery for charging and powering it - I don't think so.
Cheers

AP
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