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Single silver oxide coin cell battery with flat metallic finish

ENERGIZER

ENERGIZER 389BPZ silver oxide coin cell battery 1-pack 1.5V 85 mAh

SKU CH-EGXT-TESYP MPN 389BPZ

Silver oxide coin cell delivers 1.5 V and 85 mAh for watches and small electronics

  • TypeBatteries
  • Battery Pack1-pack
  • Battery TypeSilver Oxide Coin Cell
  • Reliable 1.5 V output powers precision devices
  • 85 mAh capacity supports extended low-drain operation
  • Silver oxide chemistry delivers stable voltage curve
  • Wide cross-reference list fits many 389-size applications
  • Operates from -4 °F to 104 °F for varied environments

What this battery fits

The Energizer 389BPZ is a silver oxide coin cell rated at 1.5 V and 85 mAh. It replaces button cells such as 389, 390, AG10, SR1130SW and SR54. The single pack supplies one fresh cell for watches, calculators, medical devices and similar low-drain electronics.

When to choose this cell

Swap to this battery when the original silver oxide cell shows voltage drop or leakage. It matches the 0.451 in diameter and 0.114 in depth of common 389/390 sizes, so the jump is worth it whenever a device specifies any of the listed cross-reference numbers.

Practical limits of the chemistry

Silver oxide chemistry delivers stable voltage until near depletion, but capacity falls sharply below -4 °F and above 104 °F. The low-drain design means it is unsuitable for high-pulse loads such as camera flashes or LED torches that demand sustained current beyond the rated 85 mAh.

Highlights

  • Reliable 1.5 V output powers precision devices
  • 85 mAh capacity supports extended low-drain operation
  • Silver oxide chemistry delivers stable voltage curve
  • Wide cross-reference list fits many 389-size applications
  • Operates from -4 °F to 104 °F for varied environments

Specifications

BrandEnergizer
Model389BPZ
TypeBatteries
Battery Pack1-pack
Battery TypeSilver Oxide Coin Cell
Shipping weight0.01 kg
Package size89 × 44 × 4 mm

Questions about this item

Will the 0.451 in diameter and 0.114 in depth fit my device's 389 compartment?

Yes, the cell measures 0.451 in across and 0.114 in thick, matching the standard 389 form factor.

Do I insert the positive side up or down when replacing the old SR1130SW?

Place the flat positive terminal facing the contact marked + on the device; reversing it will prevent the circuit from closing.

How long before the 85 mAh silver oxide cell needs replacing in a low-drain watch?

Typical low-drain use yields several months to a few years; replace when the display dims or timekeeping drifts.

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