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Rectangular black laptop battery with label showing 50WH 11.4V 3-cell

myVolts

myVolts CM03XL 50WH 3-cell 11.4V laptop battery for HP EliteBook 840 845 850 855 740 745 750 755 G1 G2

SKU CH-R1CS-DQPHA

A 50 Wh, 3-cell lithium-ion battery at 11.4 V for HP EliteBook 740, 745, 750, 755, 840, 845, 850 and 855 G1 and G2 series laptops, rated for up to 500 recharge cycles

  • 50 Wh capacity supports longer unplugged sessions
  • 4 V 3-cell lithium-ion chemistry matches original specifications
  • Compatible with EliteBook 840, 845, 850, 855, 740, 745, 750, 755 G1 and G2 models
  • Replaces HP part numbers 716724-421, 717376-001, CO06XL and CM03XL
  • Rated for up to 500 recharge cycles over battery life

Compatible HP EliteBook and ZBook Models

This 11.4V 50WH lithium-ion battery fits HP EliteBook 840, 845, 850, 855, 740, 745, 750 and 755 G1 and G2 notebooks. It also supports HP ZBook 14 G2 and ZBook 15u G2 mobile workstations. The three-cell pack replaces original part numbers including CM03, CM03XL, CO06 and CO06XL.

Practical Limits of Li-ion Chemistry

The pack is rated for up to 500 recharge cycles over its service life. Capacity will gradually diminish with each full charge and discharge cycle. Operating time per charge depends on the notebook's power draw, screen brightness and workload. Extreme temperatures can accelerate permanent capacity loss.

Installation Notes and Common Issues

The battery slots into the standard internal bay on the listed EliteBook and ZBook models. No tools are required beyond a small Phillips screwdriver for the bottom cover screws. Ensure the connector aligns correctly before applying pressure; forcing a misaligned plug can damage the motherboard header. Some users forget to disconnect the AC adapter before starting the swap.

Highlights

  • 50 Wh capacity supports longer unplugged sessions
  • 4 V 3-cell lithium-ion chemistry matches original specifications
  • Compatible with EliteBook 840, 845, 850, 855, 740, 745, 750, 755 G1 and G2 models
  • Replaces HP part numbers 716724-421, 717376-001, CO06XL and CM03XL
  • Rated for up to 500 recharge cycles over battery life

Specifications

No published specifications for this item yet.

Questions about this item

Should I choose the 50WH 3-cell or a different capacity for my EliteBook 840 G2?

This battery is a 50WH 3-cell unit at 11.4V, matching the original CM03XL specification for the EliteBook 840 845 850 855 740 745 750 755 G1 G2 series.

What runtime can I expect from the 50WH rating in daily use?

The 50WH capacity delivers the same energy as the factory CM03XL; actual runtime depends on your EliteBook model, screen brightness, workload and power settings.

Does the 11.4V voltage match the HP CO06XL interface and charging circuit?

Yes, the 11.4V output is identical to the HP CO06XL and CM03XL part numbers 716724-421 and 717376-001, so it charges and reports capacity through the standard EliteBook connector.

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