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Kastar LI-42B lithium-ion battery with LCD triple USB charger unit

Kastar

Kastar LI-42B battery and LCD triple USB charger

SKU CH-B4S9-ADMDE

Li-Ion 3.7 V 1400 mAh pack with LCD triple USB charger powering three cells at once

  • Total capacity5.18 Wh
  • Pack contents1 Charger + 1 Battery
  • Battery chemistryLi-Ion
  • Product typeBattery & Charger
  • Product dimensions3 × 2 × 2 in
  • Key featuresLCD USB Triple charger, can charge 3 batteries at the same t
  • Charges three batteries simultaneously with the LCD triple USB charger
  • Intelligent LCD display shows charging status and remaining battery capacity
  • 1400 mAh lithium-ion battery delivers 5.18 Wh for extended use
  • Powered by any 5 V 2 A USB source including wall, car or computer
  • Compatible with Panasonic cordless handsets including KX-TCA285, KX-TCA385 and KX-UDT series

Kastar LI-42B lithium-ion battery

This set includes one 3.7 V 1400 mAh lithium-ion battery and a charger that powers three cells simultaneously. It targets users of compatible Panasonic cordless handsets who need a spare power source and a way to replenish multiple packs at once. The bundle suits home or office environments where several handsets share a single charging station.

LCD charger with triple 4.2 V 0.5 A outputs

The charger accepts 5 V 2 A input via Micro USB and delivers 4.2 V at 0.5 A to each of its three independent slots. An integrated LCD panel shows real-time charging status and remaining capacity for every battery inserted. This specification determines whether the unit matches the voltage and current requirements of the target handset packs.

5.18 Wh capacity per cell for extended talk time

Each 1400 mAh cell provides 5.18 Wh of energy, supporting long conversations on models such as the KX-TCA285, KX-TCA385, KX-UDT121 and KX-UDT131. The triple-slot design allows three packs to charge together, reducing downtime for multi-handset deployments. Users needing more than three simultaneous charges or higher capacity per pack will require additional units.

How it compares

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

Price $13.99
Cheaper than about 65% of the 5,900 comparable items (median $17.99).

Specifications

Product
Brand nameKastar
Model nameLI-42B
Part numberCH-LED3-1B-PS42B-D
Total capacity5.18 Wh
Product typeBattery & Charger
Power
Battery chemistryLi-Ion
Size & build
Product dimensions3 × 2 × 2 in
In the box
Pack contents1 Charger + 1 Battery

Other versions of this model

5 more in the same range

Questions about this item

What does the 5.18 Wh capacity mean for actual use in a compatible Panasonic handset?

The 5.18 Wh lithium-ion cell replaces the original Panasonic packs listed and powers models such as the KX-TCA285, KX-TCA385 and KX-UDT121 with the same 3.7 V output.

How does the Micro-USB input and 4.2 V 0.5 A per bay output limit charging speed?

The charger draws up to 10 W from any 5 V 2 A USB source and splits it into three independent 4.2 V 0.5 A channels, so each bay charges at that fixed rate.

What physical space does the 3 × 2 × 2 inch charger need on a desk or in a bag?

The unit measures three by two by two inches and weighs little, so it fits in a small pouch or sits on a crowded desk without blocking adjacent ports.

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