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Four lithium-ion batteries and a foldable-plug wall charger

Kastar

Kastar PS-42B 4-Pack Battery & AC Charger for Sony VGP-BMS77

SKU CH-4XMC-TMGAZ

Four 1400 mAh lithium-ion cells and a foldable-plug AC charger for Sony VGP-BMS77 mouse batteries

  • Total capacity5.18 Wh
  • Pack contents1 Charger + 4 Batteries
  • Battery chemistryLi-Ion
  • Product typeBattery & Charger
  • Product dimensions3 × 2 × 3 in
  • Key featuresFoldable Flat Plug
  • Four lithium-ion batteries deliver 3.7 V 1400 mAh capacity
  • AC wall charger accepts 100–240 V input for worldwide use
  • Foldable flat plug makes the charger compact for travel
  • LED shows red while charging and green when complete
  • Replaces Sony VGP-BMS77, 4-268-590-02, SP60 and SP60BPRA9C

Replacement Power for Sony VGP-BMS77

This pack provides four lithium-ion batteries and a matching AC wall charger for the Sony Bluetooth Laser Mouse VGP-BMS77. Each cell delivers 3.7 volts and 1400 milliampere-hours, totalling 5.18 watt-hours. The bundle suits users who want spare power on hand without hunting for the original Sony 4-268-590-02, SP60 or SP60BPRA9C part numbers.

Upgrade from Single OEM Cell

The original mouse ships with one battery; this kit multiplies runtime by four and adds a dedicated charger. The jump is worth it when work sessions outlast a single charge or when a lost or aged OEM cell leaves the mouse unusable. Builders who need a second card or buyers who want more storage will not find those needs met here.

Build Integration and Charging

The charger accepts 100 to 240 volts AC at 50 to 60 hertz and outputs 4.2 volts at 600 milliamperes, with a foldable flat plug for compact storage. A red LED shows charging and green indicates standby or full charge. No extra cables or docks are required; the pack simply plugs into any mains socket and keeps all four cells ready.

How it compares

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

Price $22.99
Pricier than about 67% of the 5,900 comparable items (median $17.99).

Specifications

Product
Brand nameKastar
Model namePS-42B
Part numberNOCAR-4B-PS42B-S
Total capacity5.18 Wh
Product typeBattery & Charger
Power
Battery chemistryLi-Ion
Size & build
Product dimensions3 × 2 × 3 in
In the box
Pack contents1 Charger + 4 Batteries

Other versions of this model

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Questions about this item

What size is the AC wall charger and its foldable flat plug?

The charger measures 3 by 2 by 3 inches and features a foldable flat plug for compact storage.

How do I charge the batteries and what do the LED colours mean?

Plug the charger into a 100 to 240 volt AC outlet, insert a battery, and the LED shows red while charging and green when full or on standby.

When will the lithium-ion batteries need replacing?

Each 1400 mAh, 3.7 volt cell delivers 5.18 Wh; replace them when run-time drops noticeably or they no longer hold a full charge.

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