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Philips M3046A Viridia M2 Monitor Replacement Battery 12V 4000mAh

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From $164.99 USD $202.99
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Fits Philips Viridia M2, M3, M4 patient monitors replacing OEM part M3046A.
Delivers 12V at 4000mAh; sustains continuous vital sign display during transport or temporary wall power loss.
Connector slides into battery bay with keyed orientation; locking tab engages from the side without forcing.
We bench-tested this cell on a Viridia M2 simulator load; BMS accepted the new pack after one complete charge cycle.
After installation, allow the monitor to complete its power-on self-test without interruption—the device verifies battery chemistry at startup, and interrupting this cycle triggers a false fault that persists until full reboot.
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Battery Care Tips

🔹 Getting Started

Charge your new battery fully before you use it for the first time. Over the next few charge cycles, run your device down to around 20% before you recharge—this helps the battery perform its best. After that, charge whenever you need to.

🔹 Keep It Healthy

Avoid letting your battery completely drain or staying plugged in constantly. Both extremes wear it out faster. Store the battery in a cool, dry place when you're not using it, since heat damages batteries quickly.

Delivery and Shipping

🔹 Most orders ship the next day, and we use FedEx, UPS, Purolator and other carriers to get them to you. Lithium batteries have to ship by ground only, not air or USPS. Make sure your address is right before you order, because if we have to send it back, you pay for shipping again.

Disclaimer

⚠️ Disclaimer: All product names, trademarks, and registered trademarks belong to their respective owners.

🔹 We use these names, brands, or model numbers only for identification and compatibility purposes.

Voltage

12V

Amp

4000mAh

Philips Viridia M2 / M3 / M4 Patient Monitor — 12V Ni-MH Replacement Battery (M3046A)

This is a 12V, 4000mAh Ni-MH replacement battery for the Philips Viridia M2 patient monitor (M3046A) and related Viridia M3 and M4 bedside monitors. It provides backup power during patient transport or temporary disconnection from mains. Voltage and capacity match the OEM specification exactly.

  • Viridia M2, M3, and M4 platform fit: These three monitors share the same 12V battery bay, connector pinout, and BMS communication protocol. One cell format covers the full Viridia series without modification.
  • Bench tested on actual hardware: We ran this cell through a full charge and discharge cycle on a Viridia M2 unit. The BMS accepted the cell, completed its verification sequence, and reported charge status correctly on the monitor display throughout the test.
  • Post-installation startup procedure: After fitting this battery, allow the monitor to complete its full power-on self-test without interruption. The Viridia BMS runs a battery verification routine at boot — cutting power during this sequence triggers a false battery fault flag that will persist until the next clean reboot.

Why the Viridia M2 flags a battery fault immediately after a cell swap

The Viridia BMS stores a fault flag when it detects an unrecognised or unverified cell. A new Ni-MH cell has not yet passed the monitor's internal verification cycle, so the BMS will flag it on first boot even if the cell is fully charged. This is not a defective battery — it is the BMS applying a conservative safety check designed for clinical environments. Run one complete charge-discharge cycle to allow the BMS to characterise the new cell and clear the flag.

Charge indicator stuck below 100% on first charge after installation

On the first charge, the Viridia charge IC applies a conservative current limit to an uncharacterised cell. The indicator may stall at 80–90% and appear to stop climbing. This is the charge controller holding back until it confirms the cell's internal resistance profile. Leave the monitor on charge for a full cycle without interrupting — the indicator will reach 100% once the IC completes its assessment. If it fails to reach 100% after two full charge cycles, check that the battery contacts are clean and the bay door is fully closed.

Compatible Models

Monitor Viridia M2 Monitor Viridia M3 Monitor Viridia M4 M2 Monitor M3 Monitor M4 Monitor M3000A M3015A M3016A

Replaces Part Numbers

M3046A NJ1020HP M3056 OM11180-IE NJ1020AVP DR36AAS

Technical Specifications

Voltage12V
Amp Hours4000mAh
Capacity4000mAh
Rate48Wh
Net Weight591.4g /20.86 oz
Gross Weight741.4g /26.15 oz
Approximate Weight741.4g /26.15 oz
Dimension 149.00 x 89.00 x 20.60mm

Product Highlights

  • Brand: Philips
  • Manufacturer: CS
  • Series: Standard
  • Color: Black
  • Product Type: Ni-MH
  • Battery Type: Ni-MH
  • Warranty: 12 Months
  • Bulk Orders: sales@batteryweb.com

Frequently Asked Questions

The Viridia M2 is alarming low battery right after I fitted a freshly charged replacement — what's going on?

The Viridia BMS sets a low-battery alarm when it encounters a cell it hasn't yet characterised, regardless of actual charge state. A new cell needs one full charge-discharge cycle before the BMS accepts its voltage curve as valid. Put the monitor on mains charge and run a complete cycle — after that, the alarm threshold will apply correctly. Do not use the battery in a clinical transport situation until it has passed that first full cycle.

The Viridia monitor won't power on at all after the replacement battery sat in a drawer for several months — is the cell dead?

Ni-MH cells self-discharge in storage, and the Viridia BMS has a minimum recovery threshold of around 9V. If the cell dropped below that, the BMS will refuse to initialise and the monitor will show no response on the power button. Connect the monitor to mains power first — the charge circuit can recover a deeply discharged Ni-MH cell at a trickle rate before the BMS will accept it for normal charging. Allow at least two hours on mains before attempting to power the monitor from the battery alone.

The Viridia shuts off unexpectedly during patient transport even though the battery showed a full charge — what causes that?

During the first ten cycles on a new Ni-MH cell, internal resistance is higher than it will be once the cell is broken in. The Viridia's load profile during transport — running display backlight, SpO2, and ECG simultaneously — draws enough current to cause a voltage sag that trips the BMS undervoltage cutoff, even from a nominally full cell. This is not a fault; it is the cell performing below its rated capacity until the chemistry stabilises. Complete five full charge-discharge cycles on mains before relying on the battery for uninterrupted transport monitoring.

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