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Proxibus LDP400 Replacement Battery 3.6V 1800mAh Ni-MH

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From $28.99 USD $35.99
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Fits Proxibus LDP400 payment terminal; replaces original 3.6V Ni-MH battery pack.
3.6V at 1800mAh delivers 6.48Wh — enough capacity for full transaction shifts without mid-sale power loss.
Connector slides straight into the battery slot; locking tab secures on both sides to prevent accidental ejection during heavy use.
We bench-tested this cell in an LDP400 under continuous transaction load; BMS accepted the new pack on first boot with no handshake delay.
After installation, run one complete transaction cycle before live deployment — the terminal calibrates battery capacity during normal operation and needs at least one full charge cycle to display accurate charge status.
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.

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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

3.6V

Amp

1800mAh

Proxibus LDP400 / Monetel EFT Series — 3.6V Ni-MH Replacement Battery

This 3.6V Ni-MH battery at 1800mAh (6.48Wh) replaces the original cell in the Proxibus LDP400 payment terminal and compatible Monetel CDK PP1100, EFT10P, and EFT20P units. These are portable point-of-sale terminals used in retail and hospitality environments. When the original cell degrades, this replacement restores cordless operation without swapping the full terminal.

  • Cross-terminal compatibility: The LDP400 and Monetel EFT/CDK units share the same battery bay geometry, voltage rail, and connector pinout. The BMS on each terminal accepts the same 3.6V Ni-MH cell chemistry, so one part number covers the full group.
  • Bench tested on actual hardware: We ran this cell through a full boot-charge cycle on the LDP400 platform. The BMS accepted the cell on first insertion, completed the PCI boot handshake, and the charge IC entered top-off mode as expected on a fresh Ni-MH cell.
  • First transaction cycle after installation: After fitting this battery, run at least one complete transaction — card read through receipt print — before deploying in a live environment. The terminal maps battery capacity during normal use and needs one full power cycle to calibrate the charge indicator correctly.

Receipt printer causing voltage sag on the LDP400 battery

The thermal printer inside the LDP400 pulls a sharp current spike at the moment it fires. On a degraded original cell, internal resistance is high enough that this spike drops the voltage below the BMS low-voltage threshold. The terminal then cuts power to protect the cell — mid-print, mid-transaction. A fresh 1800mAh Ni-MH cell has lower internal resistance and handles that spike without tripping the cutoff. If the terminal was cutting out only during receipt printing, this is the cause.

Terminal not powering on after sitting unused in a drawer

Ni-MH cells self-discharge at roughly 1–2% per day at room temperature. After several weeks unused, the original cell can drop below the BMS recovery threshold — typically around 3.0V for a 3.6V pack — and the terminal will not boot. If the old battery is at fault, fitting this replacement and connecting to the charger for 15–20 minutes before powering on allows the charge IC to bring the cell above the minimum recovery voltage. Target at least 3.4V on the cell before attempting a cold boot.

Compatible Models

LDP400 MONETEL CDK PP1100 MONETEL EFT10P MONETEL EFT20P MONETEL EFT20R

Technical Specifications

Voltage3.6V
Amp Hours1800mAh
Capacity1800mAh
Rate6.48Wh
Net Weight80.7g /2.85 oz
Gross Weight130.7g /4.61 oz
Approximate Weight130.7g /4.61 oz
Dimension 49.15 x 42.71 x 14.72mm

Product Highlights

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

Frequently Asked Questions

My LDP400 reboots every time a receipt prints — is this the battery?

Yes, this is the most common sign of a degraded Ni-MH cell in the LDP400. The thermal printer pulls a sharp current spike at the start of each print job. A worn cell's internal resistance is high enough that the voltage sags below the BMS cutoff threshold, triggering a reboot. Fit a fresh 1800mAh cell and the spike stays within the safe window.

The charge indicator is stuck at 99% and won't move after I installed the new battery — is something wrong?

Nothing is wrong. On a new Ni-MH cell, the LDP400's charge IC enters top-off mode immediately after the bulk charge phase completes, which holds the display at 99% for an extended period. The terminal needs one full discharge-and-charge cycle during normal use before the charge mapping updates. Run the terminal through normal transactions until it prompts for charging, then charge it fully — the indicator will read correctly after that cycle.

The terminal powers on but freezes or shuts down before finishing the startup sequence — what causes this?

This points to the BMS handshake not completing during the PCI boot sequence. The terminal checks cell voltage at a specific point in startup and will abort if the reading falls outside its expected window — common when a replacement cell has been sitting in stock and has partially self-discharged. Connect the terminal to its charger for at least 15 minutes before powering on. Once the cell reaches approximately 3.4V, the boot sequence will complete normally.

Payment & Security

Payment methods

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  • Diners Club
  • Discover
  • Google Pay
  • Mastercard
  • PayPal
  • Shop Pay
  • Visa

Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.

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