Macintosh SE/30 without battery

[Wade]

Thanks for that link. I just bought one for my SE/30. Cheers!

 

[Anonymous Freak]

Or, if you really want to stock up... $1.80 each with free shipping on orders over $50. Yeah, if you have a big collection, 28 of these puppies would hit your $50 mark for free shipping.

 

[techknight]

I picked up abunch of those little buggers when radio shack was closing its local stores. 90% off. 

 

[Ferrix97]

You could try a supercapacitor instead of the battery, the size is similar and I'm sure you can "modify" the board to charge it when the machine is on

 

[Bunsen]

You could use Applescript to record you opening and setting the control panels for mouse, etc, then drop the script and an alias of the Date & Time CP into Startup Items.

 

[techknight]

Wasnt there an extension that would save all PRAM data, and restore it on startup? Sure no TOD clock, but mouse settings and everything else would be good. 

 

[Alex]

From what I understand, the battery delivers only a trickle when unplugged. If plugged in, the trickle is likely less. Keeping the mac plugged into the mains even if off for a few days shouldn't cause the battery to live short term.

I agree that removing the batter is best when the computer is disconnected from an outlet for several week/months

 

[djc6]

I came across this old thread looking for a replacement battery for my SE/30 that won't leak.

http://www.ebay.com/itm/1-2AA-Size-ER14250-3-6V-1200-mAh-Lithium-Battery-/170827783822

$4 with free shipping.

The OmniCel 1/2 AA ER14250 battery in this ebay listing has lithium thionyl chloride inside according to datasheet - a liquid:

https://omnicel.com/specsheets/ER14250-9-21.pdf

Or, if you really want to stock up... $1.80 each with free shipping on orders over $50. Yeah, if you have a big collection, 28 of these puppies would hit your $50 mark for free shipping.

The safety sheet for this battery on the merchant's page mentions a liquid electrolyte - its the same chemistry as the battery above.

Are all rechargeable lithium batteries like this?

 

[finkmac]

cr2032 will work well. i've had one in an se30 since 2021, it's still ticking

 

[djc6]

Are all rechargeable lithium batteries like this?

I meant to say non-rechargeable (primary) lithium batteries.

 

[SECoyote]

for my SE I used cr2032 as well. i bought a little adapter to fit it in

 

[falen5]

I just dont get this post - adjusting the volume , adjusting the mouse speed , so annoying !!!!!

time and date !!!!!.......... its just too much !!!!!

lets just hope you never had to save any work onto cassette , just to loose hours and hours of typing

volume is the only thing I might ever adjust - the rest ... who cares

time and date ? - i have a watch on my hand

mouse speed - im just happy to see the cursor moving at all

 

[SECoyote]

I just dont get this post - adjusting the volume , adjusting the mouse speed , so annoying !!!!!

ehh some people have different pain tollerances

 

[obsolete]

If you use pgreenland's ATTiny85-based RTC replacement, it stores parameters like mouse speed and volume in EEPROM. If you have a network connection, the Network Time control panel can set the correct date and time on boot for you. The combination of these two solves all the issues with running battery-less for me.

 

[finkmac]

If you use pgreenland's ATTiny85-based RTC replacement, it stores parameters like mouse speed and volume in EEPROM.

what????????????????? that's a massive game changer. does it store network selection there too?

 

[obsolete]

what????????????????? that's a massive game changer. does it store network selection there too?

It should. Anything what would normally be in PRAM. A ZuluSCSI is the only network device on the machine I'm using it with, and I'm only using either MacTCP or OT.