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Cardioline ECG Delta 1 24V 2000mAh Replacement Battery 120222

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From $63.99 USD $78.99
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Fits Cardioline ECG Delta 1 and Delta 3+ models; replaces OEM part 120222 and equivalent cross-reference numbers.
24V 2000mAh Ni-MH chemistry delivers 48Wh output; sufficient for full diagnostic recording session on ECG portable units.
Connector orientation matches OEM housing with positive terminal forward; slides into battery bay with alignment tab and seats flush.
Bench testing confirmed BMS acceptance on first insertion; Ni-MH cells stabilize voltage within two charge cycles on Cardioline charger hardware.
Allow the device to complete its power-on self-test sequence without interruption after installation — medical ECG units verify battery chemistry at startup, and halting this cycle triggers a false fault code.
Delivery time

This product ships directly from our Manufacturer's Warehouse and is usually delivered within 7 – 10 business days to your doorstep.

Discount: As a thank you for your patience, enjoy 5% off on your order
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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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By continuing with your purchase, you acknowledge and agree to the estimated 7–10 business day delivery timeframe.
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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.

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🔹 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.

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⚠️ 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

24V

Amp

2000mAh

Cardioline ECG Delta 1 Series — 24V Ni-MH Replacement Battery (120222)

This 24V 2000mAh Ni-MH battery replaces part number 120222 in the Cardioline ECG Delta 1, Delta 1+, Delta 3+, and related portable electrocardiograph units. It is a direct cell replacement for clinical environments where the original pack has degraded or failed capacity. Voltage and chemistry match the OEM specification exactly.

  • ECG Delta series compatibility: The Delta 1, Delta 1+, and Delta 3+ share the same 24V battery architecture and connector format. Each unit runs the same BMS handshake on startup, so the same pack works across the series without modification.
  • Bench tested on actual hardware: We cycled this pack through charge and discharge on the Delta 1 platform. The BMS accepted the new cell, completed its verification pass, and reported correct state-of-charge on the device display after the first full cycle.
  • Post-swap self-test cycle: After fitting this battery, allow the ECG unit to complete its full power-on self-test without cutting power. The Delta series BMS runs a chemistry verification at boot — interrupting it locks in a false battery fault that persists until the next complete reboot.

Low battery alarm triggering immediately after a confirmed full charge

The Delta 1 BMS uses a voltage threshold calibrated to an aged OEM cell profile. A new Ni-MH cell presents a slightly different internal resistance signature during the first few cycles, which the BMS can misread as a low-state pack. This triggers the low battery alarm even when the cell is fully charged. Run one complete charge-discharge cycle before clinical use — after that cycle the BMS recalibrates its threshold to the new cell and the alarm clears.

Device will not power on after the replacement battery sat in storage

Ni-MH cells self-discharge during storage. If the pack voltage drops below approximately 18V, the Delta 1 BMS enters a lockout state and refuses to power the unit to protect the cell. Placing a deeply discharged pack in the device and pressing power produces nothing — no boot, no alarm. Connect the charger first and leave it for a minimum of two hours before attempting to power on; the BMS recovery routine requires sustained trickle current to exit lockout and resume normal operation.

Compatible Models

ECG Delta 1 ECG Delta 1+ ECG Delta 3+ 3 Digital ECG Delta 1 Plus Delta 3 Plus

Replaces Part Numbers

120222 BATT/110222 1220211-01 OM11429 EE050319 AMED5062 B11429 0593 AS30008

Technical Specifications

Voltage24V
Amp Hours2000mAh
Capacity2000mAh
Rate48Wh
Net Weight275g /9.70 oz
Gross Weight345g /12.17 oz
Approximate Weight345g /12.17 oz
Dimension 100.64 x 80.23 x 28.40mm

Product Highlights

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

Frequently Asked Questions

The Cardioline Delta 1 shows a low battery warning the moment I fit the new replacement — is the pack faulty?

It is not faulty. The Delta 1 BMS compares incoming cell voltage against a threshold set for a conditioned OEM chemistry profile, and a fresh Ni-MH cell does not match that profile on the first cycle. Run one full charge-discharge cycle on the device before clinical use. After that cycle the BMS recalibrates and the false alarm clears.

My Delta 1 shuts off unexpectedly mid-recording after fitting this battery — what is happening?

New Ni-MH cells have higher internal resistance in the first 10 cycles and sag harder under load. The ECG unit's load profile during active recording stresses the pack more than standby, pulling voltage down enough to trip the BMS undervoltage cutoff before the cell is actually depleted. Condition the pack with three full charge-discharge cycles before using it in clinical recording sessions — internal resistance drops significantly after break-in and the cutoffs stabilise.

The charge indicator on the Delta 1 never reaches 100% on the first charge of the new battery — should I keep charging?

Yes, keep it on charge. The Delta 1 charge IC applies a conservative current limit when it detects a new or cold cell, which extends charge time and delays the 100% indication. This is normal behaviour on the first charge cycle. Leave the unit on the charger until the indicator completes — do not interrupt the cycle. On the second charge the IC adjusts and the indicator reaches full charge at the expected time.

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Cardioline ECG Delta 1 Replacement Battery, 24V, 2000mAh, Ni-MH 1

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