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Rectangular black laptop battery with rounded edges

Lenovo

Lenovo 3-cell 49wh 4200mAh 11.55V Battery HP 820 G4 725 G4

SKU CH-ZKKX-9VDRQ

Replacement lithium-ion battery delivering 49 Wh at 11.55 V for HP EliteBook 820 G4 and 725 G4 notebooks

  • TypeConsumer Electronics
  • Battery TypeLithium-Ion
  • 49 Wh capacity powers HP EliteBook 820 G4 and 725 G4
  • 4200 mAh lithium-ion cell delivers long runtime between charges
  • 55 V output matches original notebook specifications
  • 94 oz lightweight design adds minimal bulk to your bag
  • 3 inch slim profile fits the proprietary battery bay exactly

Compatible HP EliteBook models

This replacement battery fits the HP EliteBook 820 G4 and 725 G4 notebooks. It is a new lithium-ion pack built to the proprietary form factor required by those systems. The unit arrives ready to install without additional adapters or cables.

Capacity and physical profile

The pack stores 49 Wh at a nominal 11.55 V DC with a 4200 mAh rating. Its dimensions are 4.7 inches by 6.3 inches by .3 inches and it weighs approximately 7.94 oz. The slim profile matches the original battery bay so the laptop closes normally.

Sustained operation behaviour

Under continuous load the lithium-ion chemistry delivers steady voltage until the pack reaches its low-threshold cutoff. The battery is rechargeable and designed for repeated daily cycles in office or mobile workflows. It is not suited for devices outside the listed EliteBook models or for users needing hot-swap capability.

Highlights

  • 49 Wh capacity powers HP EliteBook 820 G4 and 725 G4
  • 4200 mAh lithium-ion cell delivers long runtime between charges
  • 55 V output matches original notebook specifications
  • 94 oz lightweight design adds minimal bulk to your bag
  • 3 inch slim profile fits the proprietary battery bay exactly

Specifications

BrandTOTAL MICRO TECHNOLOGIES
TypeConsumer Electronics
Battery TypeLithium-Ion

Questions about this item

How do I install this 49wh battery in my HP EliteBook 820 G4 and which step is often missed?

Power off the notebook, remove the bottom case screws, disconnect the old pack, connect the new 11.55 V DC lithium-ion unit, then reattach the case and screws before turning it on.

What maintenance or replacement will this 4200 mAh pack need later?

Lithium-ion cells degrade with charge cycles; expect reduced run-time after several hundred cycles and plan to replace the pack when it no longer holds a useful charge.

What limit appears first on this 7.94 oz battery during sustained use?

The 49wh capacity sets the runtime ceiling; under continuous load the pack will reach its energy limit and require recharging before other thermal or voltage limits are hit.

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