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Three small rectangular camera batteries with silver contacts and blue labels side by side

Kastar

Kastar LI-42B 3-pack 1400 mAh camera battery

SKU CH-YW49-Z0CGF

Three 1400 mAh lithium-ion batteries replace Panasonic N4FUYYYY0018, 0019, 0046 and 0047 packs with built-in protection circuits

  • TypeBattery
  • Pack3 Batteries
  • ChemicalLi-Ion
  • Capacity5.18 Wh
  • Dimensions3*2*3 Inch
  • FeaturesHigh Capacity and Manufacture Price.
  • Longer shooting sessions with 1400 mAh lithium-ion capacity
  • Built-in protection against over-charge, over-discharge and over-heating
  • Certified to UL1642 and CE safety standards
  • Three-battery pack reduces cost per unit
  • Fits Panasonic cordless handsets including KX-TCA285 and KX-UDT121

Kastar LI-42B Three-Pack Overview

This set contains three Kastar LI-42B lithium-ion batteries, each rated at 1400 mAh and 3.7 V with an energy capacity of 5.18 Wh. They are designed as direct replacements for Panasonic part numbers N4FUYYYY0018, N4FUYYYY0019, N4FUYYYY0046 and N4FUYYYY0047. The pack suits users who need multiple ready-to-go power cells for compatible devices.

Compatibility and Limitations

The batteries work with Panasonic handsets including the KX-TCA285, KX-TCA385, KX-UDT121, KX-UDT131, Attune II HD3, WX-CH455, WX-SB100, WX-ST100 and WX-ST300. Buyers whose equipment uses a different form factor or voltage should look elsewhere, as these cells will not fit or function in incompatible models.

Deciding Specification

The critical figure is the 1400 mAh capacity at 3.7 V, delivering 5.18 Wh per cell. If your device requires this exact capacity and voltage combination, the three-pack will match the original specifications; if a different capacity or chemistry is specified by the manufacturer, this pack is not the correct choice.

Highlights

  • Longer shooting sessions with 1400 mAh lithium-ion capacity
  • Built-in protection against over-charge, over-discharge and over-heating
  • Certified to UL1642 and CE safety standards
  • Three-battery pack reduces cost per unit
  • Fits Panasonic cordless handsets including KX-TCA285 and KX-UDT121

Specifications

BrandKastar
ModelLI-42B
Part NumberBA-3B-PS42B-A
TypeBattery
Pack3 Batteries
ChemicalLi-Ion
Capacity5.18 Wh
Dimensions3*2*3 Inch
FeaturesHigh Capacity and Manufacture Price.

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Questions about this item

How often will the LI-42B packs need replacing under normal use?

Lithium-ion cells degrade over hundreds of charge cycles; the built-in over-charge, over-discharge, over-voltage, over-current and over-heating protection helps maximise cycle life.

What limits continuous shooting time with a 1400 mAh cell?

The 5.18 Wh capacity sets the energy budget; sustained high-drain use such as video recording will hit that limit first.

Do the batteries run hot or draw extra power when left in a handset all day?

The protection circuit prevents over-heating and over-current during extended standby, keeping heat and parasitic draw minimal.

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