Coin cell
From Gumstix User Wiki
Batteries for coin cell backup battery holder
From Digikey
A rechargeable 6.8mm lithium coin cell battery, part #ML-621S/ZTN, is available from Digikey via this link.
A rechargeable 6.8mm lithium coin cell battery, part #ML-621S/ZTN, is available from Digikey via this link.