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Four rectangular lithium-ion camera batteries in a flat pack

Kastar

Kastar LI-42B 4-pack camera battery 1400mAh 3.7V 5.18Wh

SKU CH-MKV6-T6DZC

Four 1400mAh lithium-ion cells replace Panasonic N4FUYYYY0018, 19, 46, 47 packs with over-charge and over-heat protection

  • Total capacity5.18 Wh
  • Pack contents4 Batteries
  • Battery chemistryLi-Ion
  • Product typeBattery
  • Product dimensions3 × 2 × 3 in
  • Key featuresHigh Capacity and Manufacture Price.
  • Longer shooting sessions with 1400mAh capacity
  • Reliable power at 3.7V lithium-ion voltage
  • Safe operation backed by UL1642 and CE standards
  • Built-in protection against over-charge and over-heating
  • Four-pack covers Panasonic KX-TCA285 and KX-UDT121 handsets

Four-pack replacement batteries

Kastar LI-42B cells deliver 1400mAh at 3.7V for Panasonic handsets. The 4-battery set covers Panasonic part numbers N4FUYYYY0018, N4FUYYYY0019, N4FUYYYY0046 and N4FUYYYY0047. Each lithium-ion unit stores 5.18Wh of energy for extended talk and standby time.

Compatibility with listed Panasonic models

These batteries fit the KX-TCA285, KX-TCA385, KX-UDT121, KX-UDT131, Attune II HD3, WX-CH455, WX-SB100, WX-ST100 and WX-ST300 handsets. They replace the original packs without modification. Buyers whose devices use a different part number will need an alternative battery.

Built-in protection and thermal behaviour

UL1642 and CE certified cells include over-charge, over-discharge, over-voltage, over-current and over-heating circuits. The safeguards limit temperature rise during normal charging and discharging. No active cooling is required in typical handset operation.

How it compares

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

Price $18.99
Pricier than about 55% of the 5,900 comparable items (median $17.99).

Specifications

Product
Brand nameKastar
Model nameLI-42B
Part numberBA-4B-PS42B-A
Total capacity5.18 Wh
Product typeBattery
Power
Battery chemistryLi-Ion
Size & build
Product dimensions3 × 2 × 3 in
In the box
Pack contents4 Batteries

Other versions of this model

5 more in the same range

Questions about this item

How long will the 1400 mAh capacity actually run my handset?

The 1400 mAh lithium-ion cell delivers 5.18 Wh at 3.7 V, giving extended talk and standby time on compatible Panasonic DECT handsets such as the KX-TCA285 or KX-UDT121.

What charging standard does the LI-42B use and what protection limits apply?

The pack uses a single-cell Li-ion CC/CV profile with built-in over-charge, over-discharge, over-voltage, over-current and over-heating protection circuits certified to UL1642 and CE.

Will the 3 x 2 x 3 inch dimensions fit my Panasonic Attune II HD3 battery compartment?

The LI-42B matches the original Panasonic N4FUYYYY0018 form factor, so it fits the Attune II HD3, WX-ST300 and all other listed handsets without modification.

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