We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
Single rectangular lithium-ion battery with flat grey finish and metal contacts

Kastar

Kastar LI-42B 1400mAh 3.7V Li-Ion Battery 1-Pack

SKU CH-5M77-RD2WB

Replacement 1400 mAh 3.7 V lithium-ion pack for Panasonic Attune and WX-series drive-thru headsets

  • TypeBattery
  • Pack1 Battery
  • ChemicalLi-Ion
  • Capacity5.18 Wh
  • Dimensions3*2*1 Inch
  • FeaturesHigh Capacity and Manufacture Price.
  • Extended run-time from 1400 mAh lithium-ion cell
  • Safe operation backed by UL1642 and CE certified cells
  • Built-in protection against over-charge, over-discharge and over-heating
  • Direct replacement for Panasonic Attune and WX series headsets
  • 18 Wh capacity in a compact 3.7 V pack

Replacement Battery for Panasonic Headsets

This Kastar LI-42B lithium-ion cell replaces the original power pack in Panasonic Attune and WX-series drive-thru communication headsets. It delivers 3.7 volts and 1400 milliampere-hours for extended talk time during service shifts. The single-battery pack installs directly into the headset battery compartment.

Suits Drive-Thru Teams Needing a Direct Swap

Crews who want a drop-in replacement with built-in over-charge, over-discharge, over-voltage, over-current and over-heating protection will find this cell meets UL 1642 and CE safety standards. Operations that use a different headset platform or require a multi-bay charger should look elsewhere because this pack only covers the listed Attune and WX models.

1400 mAh Capacity Decides Runtime

The 5.18 watt-hour rating determines how many hours the headset runs between charges. If your shift length exceeds what this capacity can support, you will need a spare battery or a different power solution.

Highlights

  • Extended run-time from 1400 mAh lithium-ion cell
  • Safe operation backed by UL1642 and CE certified cells
  • Built-in protection against over-charge, over-discharge and over-heating
  • Direct replacement for Panasonic Attune and WX series headsets
  • 18 Wh capacity in a compact 3.7 V pack

Specifications

BrandKastar
ModelLI-42B
Part NumberBA-1B-PS42B-P
TypeBattery
Pack1 Battery
ChemicalLi-Ion
Capacity5.18 Wh
Dimensions3*2*1 Inch
FeaturesHigh Capacity and Manufacture Price.

Other versions of this model

5 more in the same range

Same family, different memory, cooler or clock — compare before you commit.

Questions about this item

Does the 3.7 V lithium-ion cell run hot or draw extra power during an all-day drive-thru shift?

The built-in protection circuit guards against over-heating, over-charge and over-discharge so the 1400 mAh pack stays cool and efficient through continuous use.

Which headset models must I already own for this LI-42B pack to work?

It fits Panasonic Attune, Attune 3020, Attune 3050, Attune I, Attune II, Attune II HD3, WX-CH455, WX-SB100 and WX-ST100 drive-thru headsets.

Will the 5.18 Wh capacity match the runtime of the original battery in my older Attune 3020 unit?

Yes — the 1400 mAh rating meets the same voltage and capacity spec as the factory cell for equivalent talk time.

Also in this aisle

People compared these

Same shelf, same checkout — eight coins and a 30-minute rate lock.