ST M4T28-BR12SH1 Snaphat Battery

SNAPHAT-Battery-for-Timekeeper-Memory-Devices-48mAh-ST-M4T28-BR12SH1-p-The-SNAPHAT-is-a-snap-on-package-containing-a-crystal-and-a-lithium-coin-cell-and-is-designed-to-snap-onto-the-ST-TIMEKEEPER-IC-after-the-high-temperature-surface-mount-solder-process-p-ST-M4T28-BR12SH1-Snaphat-Battery

Price: 6.96 from Rapid Online Rapid Electronics Ltd.