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Two small rectangular batteries and a compact charger with four slots, matte black finish

Kastar

Kastar NP-BY1 2-Pack Battery & Quadruple Charger 1100mAh 4.07Wh

SKU CH-MJPX-QM33N

Two 1100mAh Li-Ion batteries and a USB-C charger that powers four cells at once for Sony, Pentax, Ricoh and Sanyo cameras

  • Total capacity4.07 Wh
  • Pack contents1 Charger + 2 Batteries
  • Battery chemistryLi-Ion
  • Product typeBattery & Charger
  • Product dimensions3.5 × 2 × 2.5 in
  • Key featuresQuadruple USB charger, can charge 4 batteries at the same ti
  • Charge four batteries simultaneously with the quadruple USB charger
  • 1100 mAh lithium-ion cells deliver 4.07 Wh each for extended shooting
  • Intelligent display shows real-time charging status and battery capacity
  • Micro-USB and Type-C inputs offer flexible power options
  • Compatible with Sony NP-BY1, Pentax D-LI78, Ricoh DB-80 and Sanyo DB-L70 batteries

Two batteries and four-bay charger

The Kastar NP-BY1 kit includes two 1100mAh lithium-ion cells and a compact charger that can handle four batteries at once. It targets owners of Sony action cams such as the HDR-AZ1 series, plus compatible Pentax, Ricoh and Sanyo models listed by the supplier.

15 W input with intelligent status display

The charger accepts 5 V at 2–3 A through either Micro-USB or USB-C ports and supplies 4.2 V at up to 800 mA per bay for one or two cells, dropping to 500 mA when three or four are inserted. An on-board readout shows charging state and remaining capacity for each slot.

Swappable plates and dual USB inputs

Interchangeable plates let the same charger serve other battery types, while the supplied Type-C cable and Micro-USB option give flexibility with existing power bricks. The pack measures 3.5 by 2 by 2.5 inches, making it easy to carry alongside the camera.

How it compares

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

Price $17.99
Typical for this category: the median of 5,900 items is $17.99.

Specifications

Product
Brand nameKastar
Model nameNP-BY1
Part numberLHD4-2B-BY1-A
Total capacity4.07 Wh
Product typeBattery & Charger
Power
Battery chemistryLi-Ion
Size & build
Product dimensions3.5 × 2 × 2.5 in
In the box
Pack contents1 Charger + 2 Batteries

Other versions of this model

5 more in the same range

Questions about this item

How do I install the batteries in the quadruple charger and which orientation mistake should I avoid?

Align the battery contacts with the charger pins, slide each pack in until it clicks, and make sure the label faces up so the polarity matches the 4.2 V output.

What maintenance will the Li-Ion 1100 mAh packs need over time?

Store them at about 50 % charge in a cool place, top them up every few months, and replace a pack once it no longer holds the rated 4.07 Wh.

What limit appears first when charging four batteries together for long sessions?

The charger drops to 500 mA per slot when three or four batteries are inserted, so total charge time increases compared with one or two packs.

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