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MPD_UpdatedModel no. BK-414 is for ML414 rechargeable 3V batteries.  Targeted applications are cell phones, key fobs, remotes and back up power. BK-414 retainers offer easy battery changes without tools, lightweight, low cost, and assured contact with the battery. The ML414 battery features a very small outline of 4.8 mm dia. & 1.4 mm height.
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