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Rectangular nickel metal hydride battery pack in light plastic casing with label showing voltage and capacity markings

Estry

Estry 12.0V 1800mAh Ni-MH Battery Replacement for 23-187 LA2312 5399

SKU CH-K5M6-Y5E2A

Ni-MH 12.0 V 1800 mAh replacement pack for Realistic 23-187, Sanyo LA2312 and Sears 5399, measuring 143.0 × 62.0 × 21.0 mm and weighing 540.0 g

  • Battery pack size1 Year
  • Details12
  • Replaces original 23-187 LA2312 5399 packs exactly
  • 0V 1800mAh Ni-MH chemistry delivers 21.6Wh capacity
  • ISO9001 RoHS CE UN38.3 MSDS certified for safety
  • Overcharge over-discharge over-voltage short-circuit protection built in
  • Compact 143.0 x 62.0 x 21.0mm design weighs 540.0g

Direct replacement for legacy devices

This Estry Ni-MH pack replaces the original 12.0V 1800mAh batteries used in REALISTIC 23-187, SANYO LA2312 and SEARS 5399 equipment. It delivers 21.6Wh and matches the factory voltage and capacity specifications. The pack measures 143.0 x 62.0 x 21.0mm and weighs 540.0g. It is built to the same electrical and mechanical specs as the original unit.

Simple drop-in install with polarity care

Installation is a direct swap: open the battery compartment, disconnect the old pack and connect the new one using the existing wiring harness. The main risk is reversing the polarity or forcing the connector, which can damage the protection circuit. Confirm the part numbers 23-187, LA2312 or 5399 on your original battery before ordering. The pack includes overcharge, over-discharge, over-voltage and short-circuit protection for safer operation.

Ni-MH chemistry limits charge speed and storage

Nickel-metal hydride chemistry self-discharges faster than lithium types, so the pack loses capacity during long shelf periods. It performs best when cycled regularly rather than left in standby for months. The 12.0V nominal voltage is fixed by the cell count and cannot be adapted to other voltage platforms. Certifications include ISO9001, RoHS, CE, UN38.3 and MSDS for transport and environmental compliance.

How it compares

Measured against everything we stock in Household Batteries & Chargers, at today’s prices. Recalculated every night.

Price $41.99
Pricier than about 90% of the 10,440 comparable items (median $10.99).

Specifications

Product
Brand nameNi-MH
Model name1,800 mAh
In the box
Battery pack size1 Year

Questions about this item

How can I verify the 12.0V 1800mAh pack is working correctly after installing it in my device?

The replacement battery should power the compatible model for the expected runtime and hold a full charge without overheating or triggering the built-in overcharge, over-discharge, over-voltage and short-circuit protection circuits.

What items are included in the box and are any extra parts needed for installation?

The package contains the 12.0V 1800mAh Ni-MH battery pack measuring 143.0 x 62.0 x 21.0mm and weighing 540.0g; no additional components or cables are required for a direct swap.

Which battery version should I select to match part numbers 23-187, LA2312 or 5399?

This single 12.0V 1800mAh Ni-MH pack replaces all three listed part numbers — 23-187, SANYO LA2312 and SEARS 5399 — so no alternative capacity or voltage option is needed.

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