@tubetime nearest i could find is 17500 at batteryspace. dont be too weirded out by their 90s website, weve ordered from them at work, theyre okay. https://www.batteryspace.com/panasonic-li-ion-17500-cylindrical-rechargeable-cell-3-7v-830mah-a-size-3-07wh-0-25---un-38-3-passed.aspx