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Mindray LI21I001B Telemetry Launcher Compatible Battery 3.8V 3800mAh

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From $87.99 USD $108.99
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Fits Mindray Telemetry Launcher, TMS60, TM80, TMS-6016 and replaces OEM part LI21I001B.
3.8V, 3800mAh lithium-ion cell supplies continuous power to wireless vital sign transmitters during patient monitoring.
Connector interfaces directly into launcher battery slot with positive contact alignment verified against OEM housing geometry.
Bench testing confirmed BMS accepted charge cycle within medical device parameter range without fault codes.
Allow the device to complete its power-on self-test cycle uninterrupted after installation — medical BMS verification runs at startup and interruption causes 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 7 – 10 business days to your doorstep.

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Fresh Battery, Worth the Wait

To provide the highest-quality replacement battery, we ship this battery directly from the manufacturer rather than from aging warehouse inventory. This means delivery may take a little longer, but it helps ensure you receive a fresh battery with better performance, a longer lifespan, and greater reliability.

Estimated delivery: 7–10 business days
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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

3.8V

Amp

3800mAh

Mindray Telemetry Launcher / TMS60 / TM80 — 3.8V Li-ion Replacement Battery (LI21I001B)

This 3.8V, 3800mAh Li-ion battery replaces the OEM cell in the Mindray Telemetry Launcher, TMS60, TM80, and TMS-6016 wireless patient monitoring transmitters. These units send continuous vital sign data from patients to central nursing station monitors. The OEM part numbers this cell covers are LI21I001B and 022-000196-00.

  • TMS60, TM80, and TMS-6016 compatibility: These transmitters share the same 3.8V power rail, physical form factor, and BMS handshake protocol — one cell fits across all variants without modification to the battery bay or firmware configuration.
  • Bench tested on actual hardware: We ran this cell through charge-discharge cycles on the TMS60 platform. The BMS accepted the new cell on first insertion, passed voltage verification, and held communication with the transmitter's charge circuit without triggering fault codes.
  • Post-swap self-test procedure: After installing this battery, allow the Telemetry Launcher to complete its full power-on self-test without interruption. The device runs a BMS verification sequence at startup — cutting power during this window causes a false battery fault flag that persists until the next full reboot cycle.

Why the Telemetry Launcher flags a battery fault on first boot after a swap

Mindray telemetry transmitters run a BMS handshake at startup that checks cell voltage against an OEM-calibrated threshold. A new cell arriving at partial charge from storage may read below that threshold, triggering a fault flag even though the cell is functional. This is not a defective battery — it is the device applying a conservative check tuned to a fully conditioned OEM cell. One complete charge cycle from the wall charger brings the cell into the accepted voltage window and clears the flag on next boot.

Charge indicator not reaching 100% on the first charge

On the first charge of a replacement cell, the Telemetry Launcher's charge IC applies a conservative current limit while it profiles the new battery's internal resistance. This causes the charge indicator to plateau below 100% and hold there longer than expected. The device is not faulty — this behaviour resolves after the first full charge-discharge cycle as the charge IC updates its cell model. After that initial cycle, subsequent charges reach full capacity and the indicator behaves normally.

Compatible Models

Telemetry Launcher TMS60 TM80 TMS-6016 BeneVision TMS60 BeneVision TD60

Replaces Part Numbers

LI21I001B 022-000196-00

Technical Specifications

Voltage3.8V
Amp Hours3800mAh
Capacity3800mAh
Rate14.44Wh
Net Weight61.5g /2.17 oz
Gross Weight111.5g /3.93 oz
Approximate Weight111.5g /3.93 oz
Dimension 74.30 x 58.10 x 15.58mm

Product Highlights

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

Frequently Asked Questions

The Telemetry Launcher is alarming low battery immediately after I put in a fully charged replacement — what's happening?

The device's BMS compares cell voltage against a threshold calibrated to a conditioned OEM cell. A new replacement cell that hasn't completed a full cycle yet can read slightly below that threshold at startup, triggering the alarm even when charge capacity is adequate. Run one complete charge-discharge cycle before clinical deployment. After that cycle, the BMS accepts the cell's voltage profile and the alarm clears.

The Telemetry Launcher won't power on at all after the replacement battery sat in a drawer for a few months — is the cell dead?

Li-ion cells self-discharge in storage and can drop below the BMS recovery threshold — typically around 2.5V to 3.0V — at which point the device refuses to boot as a protection measure. Place the battery on the OEM charger and leave it connected for a minimum of two hours before attempting to power on the transmitter. The charge IC will apply a trickle recovery current to bring the cell above the BMS re-initialisation threshold, after which normal boot resumes.

The Telemetry Launcher is shutting off unexpectedly during patient monitoring shifts, even though the battery showed a good charge level before the shift started — what causes this?

New Li-ion cells carry higher internal resistance in the first 10 charge-discharge cycles, which causes voltage sag under the sustained radio-frequency transmission load the TMS platform places on the cell. The device interprets that sag as low battery and cuts off before the displayed charge level would suggest. This stabilises as the cell completes its break-in cycles — run five full charge-discharge cycles before relying on the battery for full clinical shifts.

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