Macintosh Portable replacement battery

[falen5]

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?

 

[falen5]

i should of kept looking a bit longer.

here is a thread for anyone else

 

[falen5]

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:goUAAOSwd4tUBIEV

 

[LaPorta]

This is what I used. Basically a direct replacement:

https://www.batteriesplus.com/battery/sla-sealed-lead-acid/6/hawk0809=0012

 

[falen5]

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

 

[LaPorta]

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.

 

[falen5]

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.

 

[spiceman]

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.

 

[AlpineRaven]

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