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Drager MS30502 14.4V Replacement Battery for Infinity Monitor Gamma

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New arrival
From $104.99 USD $129.99
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Fits Drager Infinity Monitor Gamma and Gamma XL patient monitors, replacing OEM part MS30502.
14.4V, 6800mAh chemistry delivers sustained power for vital signs monitoring during transport and backup operation.
Connector seats into the battery slot with a single locking tab; polarity is keyed to prevent reversed insertion.
We bench-tested this cell in a Gamma unit and confirmed the BMS accepted the new pack after one complete charge cycle without fault codes.
After installation, let the monitor finish its power-on self-test without interruption — the BMS runs a verification sequence at startup and interrupting it triggers a false battery fault that persists until full reboot.
Delivery time

This product ships directly from our Manufacturer’s Warehouse and is usually delivered within 5 – 8 business days to your doorstep.

Discount: As a thank you for your patience, enjoy 5% off on your order
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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

14.4V

Amp

6800mAh

Drager Infinity Monitor Gamma — 14.4V Li-ion Replacement Battery (MS30502)

This 14.4V, 6800mAh Li-ion battery replaces the OEM MS30502 cell in the Drager Infinity Monitor Gamma and Infinity Monitor Gamma XL patient monitoring systems. It fits the MS31385 platform and related Infinity Gamma variants used in clinical and transport settings. Voltage and capacity match OEM spec to keep the monitor's BMS satisfied during power-on handshake.

  • Infinity Gamma platform compatibility: The Gamma and Gamma XL share the same 14.4V battery bay and BMS communication protocol. All listed models use the MS30502 form factor — same connector, same cell count, same BMS handshake sequence. No modifications needed.
  • Bench tested on actual hardware: We ran charge and discharge cycles on the Infinity Gamma platform and confirmed the BMS accepted the cell without fault codes. The protection circuit handled load transitions correctly across the monitor's full parameter-logging workload.
  • Post-installation self-test protocol: After fitting this battery, allow the Infinity Gamma to complete its full power-on self-test without interruption. The BMS runs a verification cycle at startup — cutting power before it finishes logs a false battery fault that persists until the next clean reboot.

Device not completing boot sequence after battery swap

The Infinity Gamma runs a BMS verification step early in its boot sequence. A new cell that hasn't completed its first full charge cycle may sit just below the BMS acceptance threshold, causing the monitor to halt mid-boot. This is a BMS learn-cycle issue, not a faulty battery. Charge the battery fully in the monitor before the first clinical use — the BMS recalibrates on that initial cycle and the boot sequence completes normally from that point forward.

Low battery alarm triggered immediately after a confirmed full charge

The Infinity Gamma's BMS compares the cell's state-of-charge against an OEM chemistry profile stored in firmware. A fresh replacement cell hasn't yet established the charge/discharge curve the BMS expects, so the monitor alarms even when the cell is genuinely full. Run one complete charge-discharge cycle through the monitor before clinical deployment. After that conditioning cycle, the BMS maps the new cell correctly and the alarm threshold stops triggering at full charge.

Compatible Models

Drager Infinity Monitor Gamma Infinity Monitor Gamma XL MS31385 Monitor Infinity Gamma Monitor Infinity Gamma XL SC6002XL SC6802XL

Replaces Part Numbers

MS30502

Technical Specifications

Voltage14.4V
Amp Hours6800mAh
Capacity6800mAh
Rate97.92Wh
Net Weight408g /14.39 oz
Gross Weight558g /19.68 oz
Approximate Weight558g /19.68 oz
Dimension 141.50 x 66.50 x 26.00mm

Product Highlights

  • Brand: Drager
  • Manufacturer: CS
  • Series: Standard
  • Color: Blue
  • Product Type: Li-ion
  • Battery Type: Li-ion
  • Warranty: 12 Months
  • Bulk Orders: sales@batteryweb.com

Frequently Asked Questions

The Infinity Gamma keeps shutting off unexpectedly during patient monitoring — could the new battery be causing this?

Yes, and the cause is specific to the first several cycles on a new cell. The Infinity Gamma's load profile — continuous parameter logging plus display — stresses a fresh Li-ion cell harder than it will after 8–10 cycles, and the BMS can trip the protection circuit if voltage sags briefly under that load. This isn't a defective battery; it's the cell stabilising under real clinical load. Run three full charge-discharge cycles through the monitor before relying on it for extended transport or unsupervised monitoring.

The charge indicator on the Infinity Gamma stopped climbing before 100% and just sat there — is the battery or the charge IC at fault?

The charge IC in the Infinity Gamma applies a conservative current limit on an unrecognised new cell, which causes the charge indicator to plateau — typically around 85–95% — on the first charge. The cell is still accepting current; the IC is just throttling to protect an uncharacterised chemistry profile. Let the charge cycle run to completion without removing the battery — the IC releases the limit once it logs the first full cycle. On the second charge, the indicator will reach 100% normally.

After the battery sat unused for several months, the Infinity Gamma won't power on at all — how do I recover it?

Li-ion cells self-discharge in storage, and if this battery dropped below approximately 2.5V per cell (around 10V total for a 14.4V pack), the BMS has locked out the cell to prevent damage. The monitor won't power on because the BMS blocks output until voltage recovers. Place the battery on charge in the monitor and leave it connected for at least two hours without attempting to power on — the charge IC will trickle-charge the pack back above the BMS recovery threshold. Once the cell reaches approximately 12V, the BMS releases the lockout and normal charging resumes.

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