Single-use battery Panasonic SR-621

The Panasonic SR-621 is a single-use coin battery providing 1.55 V and approximately 23 mAh of capacity in a compact metal package measuring about 6.8 mm × 6.8 mm × 2.15 mm. Designed for small electronic devices, it offers consistent voltage output and stable performance for low-drain applications where compact size and reliable power are required.

Advantages

The SR-621 delivers a steady 1.55 V output and is engineered for predictable discharge in devices that require low continuous current. Its small diameter and low height enable installation in tight compartments, while the sealed construction protects against leakage under normal conditions. Lightweight and compact, the cell is suitable for devices where space and weight constraints matter.

Key specifications

• Battery type: single-use (primary) coin cell
• Nominal voltage: 1.55 V
• Typical capacity: 23 mAh
• Dimensions (approx.): 6.8 mm × 6.8 mm × 2.15 mm
• Weight (approx.): 0.0003 kg
• Chemistry: silver oxide (typical for this size and voltage)

How to use

Ensure correct polarity when inserting the SR-621 coin cell into the device: the positive side usually faces outward or toward the marked + terminal. Handle the battery with dry hands and do not force it into the compartment; if the battery does not fit freely, verify that the device accepts this size. Replace with an identical type and voltage to maintain device function and avoid damage. Dispose of used batteries according to local regulations for single-use cells.

Recommendations

Store unused batteries in a cool, dry place away from metal objects that could short the terminals. Keep out of reach of children and avoid attempting to recharge single-use cells. For devices with critical measurement or memory functions, replace the battery before the end of expected life to prevent data loss or malfunction.