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
Three rectangular lithium-ion camera batteries in blue wrap

Kastar

Kastar LI-42B 3-Pack 1400mAh 3.7V Li-Ion Camera Battery

SKU CH-M9F5-MYNQM

Three 1400 mAh 3.7 V lithium-ion packs replace Panasonic Attune, Attune 3020, Attune 3050, Attune I, Attune II, Attune II HD3, WX-CH455.

  • TypeBattery
  • Pack3 Batteries
  • ChemicalLi-Ion
  • Capacity5.18 Wh
  • Dimensions3*2*3 Inch
  • FeaturesHigh Capacity and Manufacture Price.
  • Longer run time with 1400 mAh lithium-ion cells
  • Three batteries in one pack for continuous operation
  • Built-in protection against over-charge and over-heating
  • Tested to UL1642 and CE safety standards
  • Replaces Panasonic Attune and WX series headset batteries

Three-pack replacement for Panasonic Attune headsets

This Kastar LI-42B set contains three lithium-ion cells rated at 3.7V and 1400mAh each. They are built as direct replacements for the batteries used in Panasonic Attune, Attune 3020, Attune 3050, Attune I, Attune II, Attune II HD3, WX-CH455, WX-SB100 and WX-ST100 drive-thru communication headsets. The pack supplies a total of 5.18 Wh per cell and includes over-charge, over-discharge, over-voltage, over-current and over-heating protection circuits.

Upgrading from worn or lost original cells

If your headset runtime has dropped or the original pack no longer holds a charge, this three-pack restores full talk time without waiting for a single battery to recharge. The jump is worth it when a drive-thru lane cannot afford downtime and swapping a fresh cell is faster than tethering the headset to a charger. UL1642 and CE compliance confirms the cells meet recognised safety baselines for lithium-ion replacements.

Verify the headset model before ordering

Check the label on your Panasonic unit to confirm it is one of the Attune, Attune 3020, Attune 3050, Attune I, Attune II, Attune II HD3, WX-CH455, WX-SB100 or WX-ST100 models listed. The batteries are not compatible with other Panasonic headsets or with camera bodies that use the LI-42B designation. Ensure the charging cradle or dock you use accepts 3.7V lithium-ion cells of this physical size.

Highlights

  • Longer run time with 1400 mAh lithium-ion cells
  • Three batteries in one pack for continuous operation
  • Built-in protection against over-charge and over-heating
  • Tested to UL1642 and CE safety standards
  • Replaces Panasonic Attune and WX series headset batteries

Specifications

BrandKastar
ModelLI-42B
Part NumberBA-3B-PS42B-P
TypeBattery
Pack3 Batteries
ChemicalLi-Ion
Capacity5.18 Wh
Dimensions3*2*3 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

Will these 3.7 V 1400 mAh cells fit inside the battery compartment of my Panasonic WX‑ST100 headset?

Yes — they are built as direct replacements for the Panasonic Attune, Attune 3020, 3050, I, II, II HD3, WX‑CH455, WX‑SB100 and WX‑ST100 models listed by the supplier.

How do I install the three LI‑42B batteries, and what step do people often miss?

Open the headset’s battery door, match the polarity markings on each cell to the contacts, insert all three, then close the door fully — the step most often missed is seating the door latch so the contacts stay aligned.

What ongoing care will these lithium‑ion packs need?

Store them at roughly half charge if unused for weeks, recharge before the voltage drops too low, and keep the contacts clean; the built‑in protection circuit meets UL1642 and CE standards to guard against over‑charge, over‑discharge, over‑voltage, over‑current and overheating.

Also in this aisle

People compared these

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