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What is the soldered cmos battery on a toshiba a300 -1mc laptop

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Anonymous
a b D Laptop
January 24, 2011 8:17:20 AM

Trying to find a replacement cmos battery for a toshiba A300-1MC laptop. It is soldered on the motherboard. (Think it might be a sony ML1220) but not sure and cannot find replacement.
a c 572 D Laptop
January 24, 2011 9:01:07 AM

TOSHIBA SATELLITE A300 CMOS BIOS RTC BATTERY £11.95

Sony ML1220 battery:
Rechargeable lithium button cell battery voltage 3V,capacity 15mAh, dimension 12.5X2.0mm,weight 0.80g
Any battery matching the tech specs should work OK.
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February 20, 2011 9:08:47 AM

WR2 said:
TOSHIBA SATELLITE A300 CMOS BIOS RTC BATTERY £11.95

Sony ML1220 battery:
Rechargeable lithium button cell battery voltage 3V,capacity 15mAh, dimension 12.5X2.0mm,weight 0.80g
Any battery matching the tech specs should work OK.

it looks sautered to the mb?
April 14, 2013 1:24:25 AM

Yes, it is soldered to the motherboard using a heat tunnel that solders all components on to the motherboard. SN63 solder is the typical solder that is used on all those surface mountable devices including this ML1220 rtc clock battery that is made by Sanyo, FDK and Maxell for Toshiba for their Toshiba A300 & A305 motherboard. The battery in itself has two welded tabs for the positive and negative polarities. The negative pole is positioned up while the positive side of the battery and it's welded tab is facing the motherboard. The positive tab is in a horizontal plane, extruded outwards, while the negative tab folds over the pvc collar and then bent 90 degree before it too is in a horizontal axis. Then those two printed tabs will have each of the tabs connected by this solder flow. You could use other brands as the person said above, so long as the onboard charging circuit will replenish the voltage to the battery when the battery has drained.
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