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Rectangular black lithium-ion battery pack measuring 9.19 by 3.87 by 0.23 inches

FOCUSTEC

FOCUSTEC 33YDH 15.2V 56Wh laptop battery

SKU CH-ZV1R-5DTCD

15.2V 56Wh lithium-ion replacement battery for Dell Inspiron 17 7000, G series, Latitude and Vostro models, includes screwdrivers

  • Battery TypeLithium-Ion
  • Replaces Dell part numbers 99NF2 PVHT1 81PF3 081PF3 DNCWSCB6106B
  • 56Wh capacity at 15.2V powers compatible Dell Inspiron G-series Latitude Vostro laptops
  • Lithium-ion 4-cell design weighs 0.75 lb for portable use
  • Includes two screwdrivers and manual for straightforward self-installation
  • Built-in short-circuit over-voltage discharge and over-current protection circuits

Compatible Dell laptops

The FOCUSTEC 33YDH is a 15.2 V, 56 Wh lithium-ion replacement battery built for a wide range of Dell machines. It fits Inspiron 17 7000 series models such as the 7773, 7778, 7779 and 7786 2-in-1, plus the Inspiron 15 Gaming 7577. It also covers G-series models including the G3 3579 and 3779, G5 5587 and G7 7588, along with Latitude 3380, 3490, 3580 and 3590 and Vostro 7570 and 7580 units. The pack replaces original part numbers 99NF2, PVHT1, 81PF3 and 081PF3.

Thermals and daily power

The four-cell pack weighs about 0.75 lb and measures roughly 9.19 by 3.87 by 0.23 in, matching the original chassis footprint. Built-in protection circuits guard against short circuit, over-voltage, over-current and excessive discharge during normal operation. No active cooling is required; the battery runs silently and maintains a stable 15.2 V output for everyday office or browsing workloads. Two screwdrivers and a user manual are included for straightforward installation.

Sustained load behaviour

Under continuous demand such as gaming or video rendering, the 56 Wh capacity delivers consistent energy until the protection thresholds engage. The lithium-ion chemistry resists voltage sag better than aged original packs, so performance remains steady through long sessions. Safety circuits will throttle output if temperature or current limits are exceeded, preventing damage to both the battery and the laptop. Users who need more capacity than 56 Wh or a higher-voltage design should look elsewhere.

Highlights

  • Replaces Dell part numbers 99NF2 PVHT1 81PF3 081PF3 DNCWSCB6106B
  • 56Wh capacity at 15.2V powers compatible Dell Inspiron G-series Latitude Vostro laptops
  • Lithium-ion 4-cell design weighs 0.75 lb for portable use
  • Includes two screwdrivers and manual for straightforward self-installation
  • Built-in short-circuit over-voltage discharge and over-current protection circuits

Specifications

Battery TypeLithium-Ion

Questions about this item

How do I install the 33YDH battery and which step is most often missed?

Remove the bottom case screws with the two included screwdrivers, disconnect the old battery cable, fit the new 4-cell 15.2V pack, then reconnect the cable before refitting the case — the cable reconnection is the step most often missed.

What maintenance or replacement will the 56Wh lithium-ion pack need later?

The 4-cell 15.2V lithium-ion battery will gradually lose capacity over repeated charge cycles; when run time drops below your needs, replace it with another 33YDH or compatible part such as 99NF2, PVHT1, 81PF3 or 081PF3.

What limit appears first during sustained use of the 15.2V 56Wh battery?

The 56Wh capacity sets the runtime ceiling; under continuous load the pack will deplete to its low-voltage protection threshold before thermal or current limits are reached.

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