MPD also offers a very large selection of other coin cell battery retainers. Coin cell retainer part number BK-414, for example, is for ML414 rechargeable batteries. Designed to meet the rigorous demands of portable equipment like cell phones, these holders are ultra light weight and low cost with exceptional reliability during high shock and vibration. These coin cell battery holders come in through hole and surface mount options; accept most common sizes of watch, button or coin cells; have dual beam contacts; and require no tooling to change the battery.