replacing the internal battery

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Artyom
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replacing the internal battery

Post by Artyom » Thu Apr 28, 2011 9:21 am

Hello,

Currently I'm looking into replacing the dead 3v coin cell in my dreamcast with something that has a bit more juice. The battery I'm hoping to use is a 3.6V 1200 mAh 1/2AA Keeper cell Li/SOCI2. The extra 0.6v shouldn't matter right? if so is there anything I need to wire up so I don't blow something?

-Thanks,
Artyom

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ishowernaked
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Re: replacing the internal battery

Post by ishowernaked » Sat Apr 30, 2011 3:28 pm

naw, it shouldn't matter.... i think
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jdmlight
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Re: replacing the internal battery

Post by jdmlight » Sat Apr 30, 2011 4:05 pm

Why wouldn't you just use two AA lithium batteries?
This kind:
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That way you're still giving it 3v. And two AA's would last basically forever if it originally had a coin-sized battery.
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DiscoPanda
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Re: replacing the internal battery

Post by DiscoPanda » Sat Apr 30, 2011 6:50 pm

jdmlight wrote:Why wouldn't you just use two AA lithium batteries?
This kind: http://www.tapeonline.com/images/produc ... e-1393.jpg
That way you're still giving it 3v. And two AA's would last basically forever if it originally had a coin-sized battery.
Won't the Dreamcast attempt to trickle-charge the CMOS battery, which as I remember tends to end badly when you've substituted alkaline AA batteries?

Actually, I seem to remember there being some form of mod involving a diode, so that it will draw from the AA batteries but can't attempt to charge it, but I don't remember the specifics at this moment.

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electromaster64
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Re: replacing the internal battery

Post by electromaster64 » Sat May 07, 2011 6:26 pm

You can use two rechargeable AA or AAA batteries and it works fine. If you use lithium it will eventually leak acid everywhere and you don't want that :) I bought a rechargeable 2032 coin cell off of ebay to replace mine but as long as it is rechargeable and around 3v it doesn't matter.
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electromaster64
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Re: replacing the internal battery

Post by electromaster64 » Wed May 18, 2011 12:06 pm

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omp
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Re: replacing the internal battery

Post by omp » Thu Jun 30, 2011 5:18 am

Did the same a while ago and sent a guide to mmmonkey to put on his site. Note the charge voltage anything above 3v wouldn't be the key. With this battery you need to follow the original instructions ie: turn it on every 1.5-2 weeks to keep the charge up.

http://www.mmmonkey.co.uk/console/downl ... cement.pdf

Haunted360
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Re: replacing the internal battery

Post by Haunted360 » Thu Jun 30, 2011 6:24 am

Those pictures are perfect! Thats one good camera.


Ahem, uh. *cough* back on topic.

Why hasn't someone made the CMOS / BIOS batteries run off of a 3 volt rechargeable lithium ion battery? When the battery dies, it charges itself from a power source using a circuit (power from the console / mainboard)...

Meraviglioso
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Re: replacing the internal battery

Post by Meraviglioso » Mon Sep 19, 2011 5:12 am

Haunted360 wrote: Why hasn't someone made the CMOS / BIOS batteries run off of a 3 volt rechargeable lithium ion battery? When the battery dies, it charges itself from a power source using a circuit (power from the console / mainboard)...
because they might leak. sure you don't want that, do you?
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Haunted360
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Re: replacing the internal battery

Post by Haunted360 » Mon Sep 19, 2011 5:42 am

Meraviglioso wrote:
Haunted360 wrote: Why hasn't someone made the CMOS / BIOS batteries run off of a 3 volt rechargeable lithium ion battery? When the battery dies, it charges itself from a power source using a circuit (power from the console / mainboard)...
because they might leak. sure you don't want that, do you?
Not unless it is in a sealed container :wink:

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electromaster64
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Re: replacing the internal battery

Post by electromaster64 » Mon Sep 19, 2011 6:20 pm

Haunted360 wrote:Those pictures are perfect! Thats one good camera.
Thanks! My wife loves photography and I get to use her camera :)
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