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Kenz Cardico 302 Replacement Battery 12V 2000mAh Ni-MH

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Fits Kenz Cardico 302 portable ECG monitor; replaces OEM part 10TH-1800A-W1.
12V 2000mAh Ni-MH chemistry delivers sustained output for extended cardiac monitoring sessions without voltage sag.
Connector slides into the battery compartment with positive terminal forward; locking tab seats flush against the device housing.
We bench-tested this cell in the Cardico 302 charging circuit; BMS accepted the new pack on first insertion with no fault codes.
After installation, allow the device to complete its power-on self-test cycle without interruption—medical devices run BMS verification at startup, and stopping this sequence causes a false battery fault that persists until the next 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.

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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

12V

Amp

2000mAh

Kenz Cardico 302 — 12V Ni-MH Replacement Battery (10TH-1800A-W1)

This is a 12V 2000mAh Ni-MH replacement battery for the Kenz Cardico 302 portable ECG monitor. It fits the 302 handheld cardiac diagnostic unit used in clinical and patient-side settings. Voltage and capacity match the OEM specification: 12V, 2000mAh (24Wh).

  • Kenz Cardico 302 compatibility: The 302 platform draws on a fixed 12V rail with a proprietary BMS handshake that validates cell chemistry at startup. Ni-MH chemistry is required — the device will reject Li-ion substitutes at the self-test stage due to discharge curve mismatch.
  • Bench tested on actual hardware: We ran this cell through the 302's power-on sequence and monitored BMS communication across charge and discharge cycles. The protection circuit engaged correctly at low-voltage cutoff and accepted the charger handshake without fault flags.
  • Power-on self-test protocol: After fitting this battery, let the 302 complete its full startup self-test without interruption. The device runs a BMS verification routine at boot — cutting power mid-sequence can latch a false battery fault that won't clear until the next full restart cycle.

Kenz Cardico 302 alarming low battery immediately after a confirmed full charge

The 302's BMS compares the incoming cell's discharge profile against a stored threshold calibrated to a conditioned OEM cell. A fresh Ni-MH cell hasn't established that profile yet, so the monitor can flag low battery even when the pack is fully charged. This is a first-cycle calibration issue, not a fault with the battery. Run one complete charge-to-discharge cycle before clinical use — after that cycle, the BMS updates its reference and the alarm clears.

Device fails to power on after the replacement cell sat unused in storage

Ni-MH cells self-discharge at roughly 1–3% per day in storage. A cell that has sat for several months can drop below the 302's BMS recovery threshold — typically around 9V for a 12V Ni-MH pack — at which point the monitor won't boot at all. Connect the battery to the device charger and leave it for a full uninterrupted charge cycle before attempting to power on. If the charger LED doesn't respond within 30 minutes, measure pack voltage directly — anything below 8V requires a slow pre-charge trickle to recover the cells.

Compatible Models

302

Replaces Part Numbers

10TH-1800A-W1 HHR-20AF25G1 10TH-1800A-W1 SU

Technical Specifications

Voltage12V
Amp Hours2000mAh
Capacity2000mAh
Rate24Wh
Net Weight320g /11.29 oz
Gross Weight390g /13.76 oz
Approximate Weight390g /13.76 oz
Dimension 84.00 x 43.00 x 34.00mm

Product Highlights

  • Brand: Kenz Cardico
  • 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

Why does my Kenz Cardico 302 keep shutting off unexpectedly during a recording, even though the battery showed charged before I started?

The 302 applies a sharp load spike when it activates the thermal print head mid-recording. Fresh Ni-MH cells with fewer than 10 cycles have higher internal resistance, which causes voltage to sag under that load — enough to trip the low-voltage cutoff and kill the session. This isn't a faulty battery; it's a new-cell characteristic that resolves after several full charge-discharge cycles. Complete at least three full cycles before relying on the device for uninterrupted clinical recordings.

The charge indicator on the 302 won't reach 100% on the first charge — it stalls at around 80–85%. Is the battery defective?

The 302's charge IC applies a conservative delta-V termination limit on cells it hasn't profiled before. On the first charge, it often cuts off early rather than risk overcharging an unknown pack. This is normal behaviour — not a cell defect. Run a full discharge followed by a second uninterrupted charge cycle, and the charge IC recalibrates its termination point. After the second cycle, the indicator should reach full charge without stalling.

The Kenz Cardico 302 passed its self-test after I swapped the battery, but it's now reading a lower capacity than the old battery — why?

The 302's BMS estimates capacity based on a learned discharge curve built over charge-discharge cycles. After a fresh swap, it hasn't collected enough data to accurately gauge the new cell's actual capacity, so it defaults to a conservative estimate that reads low. This is a BMS learn-cycle gap, not a capacity shortfall in the cell itself. Run two full charge-discharge cycles outside of clinical use, and the capacity reading will update to reflect the actual 2000mAh rating.

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