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Laerdal Resusci Baby QCPR 7.4V Replacement Battery 161-40023

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From $43.99 USD $54.99
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Fits Laerdal Resusci Baby QCPR manikin, replaces OEM battery 161-40023.
7.4V and 2600mAh capacity powers the electronic feedback systems for full training sessions.
Connector orientation matches the original — insert and lock the tab until it seats flush.
We bench-tested this cell in the Resusci platform; the BMS completed handshake on first charge without fault codes.
Allow the device to run its full power-on self-test cycle after installation before clinical use — medical devices verify new battery chemistry at startup, and interrupting this sequence triggers a false fault.
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

7.4V

Amp

2600mAh

Laerdal Resusci Baby QCPR — 7.4V Li-ion Replacement Battery (161-40023)

This 7.4V Li-ion cell is a direct replacement for the Laerdal Resusci Baby QCPR training manikin. At 2600mAh (19.24Wh), it powers the manikin's electronic CPR feedback and sensor systems. It matches the OEM part number 161-40023 and fits the QCPR platform's battery bay and connector.

  • Resusci Baby QCPR feedback electronics: The QCPR platform runs compression-depth sensors, airway feedback, and wireless data transmission from a single 7.4V supply rail. This cell meets that voltage requirement and carries the BMS handshake the device expects at startup.
  • Bench tested on actual hardware: We cycled this cell through the QCPR's power-on self-test sequence and confirmed the BMS passed state-of-charge verification without triggering a false fault. Load draw during active training simulation stayed within the cell's rated discharge envelope throughout testing.
  • Post-swap startup protocol: After installing this battery, let the Resusci Baby QCPR complete its full power-on self-test without interruption. The device's BMS runs a chemistry verification at boot — cutting power mid-sequence writes a battery fault flag that persists until the next clean reboot.

Why the Resusci Baby QCPR alarms low battery immediately after a confirmed full charge

The QCPR's charge IC applies a conservative state-of-charge threshold on first contact with a new cell. The BMS compares internal resistance and open-circuit voltage against a learned baseline from the previous cell — a new cell hasn't established that baseline yet. This mismatch triggers the low-battery flag even when the cell is sitting at full charge. One complete charge-discharge cycle resets the learned baseline and clears the alarm.

Resusci Baby QCPR not powering on after the battery sat in storage

Li-ion cells self-discharge at roughly 2–3% per month in storage. If the cell voltage drops below approximately 2.5V per cell (5.0V pack), the QCPR's BMS enters deep-discharge lockout and will not allow a normal boot. The fix is a slow pre-charge using a compatible Li-ion charger that supports recovery mode — this trickle-charges the pack back above the 6.0V threshold the BMS needs before it will permit a full charge cycle. Once the pack reads above 6.0V, connect to the standard Laerdal charger and run a full charge before powering the manikin on.

Compatible Models

Resusci Baby QCPR

Replaces Part Numbers

161-40023

Technical Specifications

Voltage7.4V
Amp Hours2600mAh
Capacity2600mAh
Rate19.24Wh
Net Weight126g /4.44 oz
Gross Weight196g /6.91 oz
Approximate Weight196g /6.91 oz
Dimension 86.20 x 45.00 x 33.40mm

Product Highlights

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

Frequently Asked Questions

The Resusci Baby QCPR shows a low battery warning straight after I put in a freshly charged replacement — is the new battery faulty?

It's not faulty. The QCPR's BMS compares the new cell's internal resistance profile against the baseline it built with the old battery, and a new cell hasn't established that data yet. This mismatch flags a false low-battery alert on the first one or two sessions. Run one complete charge-discharge cycle on the new cell and the BMS recalibrates — the warning clears once the pack voltage reading matches the updated baseline.

The Resusci Baby QCPR shuts off unexpectedly mid-session even though the battery shows charged — what's happening?

Medical training manikins like the QCPR apply a harder load profile in the first 10 cycles than a standard consumer device — compression sensors, wireless transmission, and the feedback motor draw simultaneously. A new cell's internal resistance is slightly higher before break-in, and under that combined load the instantaneous voltage sag trips the BMS undervoltage cutoff even when the resting charge looks fine. Complete at least five full charge-discharge cycles before using the manikin in a clinical training session, and confirm resting pack voltage reads above 7.2V before use.

The charge indicator on the Resusci Baby QCPR won't reach 100% on the first charge with a new battery — should I keep charging?

The device's charge IC applies a current-limited top-off when it detects a cell it hasn't profiled before, which means the first charge terminates early by design — typically showing 90–95% on the indicator. This is the charge controller being conservative, not a capacity defect. Let the pack cool for 20 minutes after the first charge ends, then place it back on charge for a second pass. After that second cycle, the charge IC updates its termination threshold and subsequent charges will reach 100%.

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