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Diebold 10HR-4/3FAU Replacement Battery 12V 3600mAh

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Fits Diebold AccuVote-TSX touch screen voting machines, replaces OEM part numbers 10HR-4/3FAU, 29-014509-000A-1, HHR-380AB27F10, and H450AE-10DB.
Delivers 12V and 3600mAh capacity; this nickel-metal hydride pack maintains backup power for polling-place systems during utility fluctuations or outages.
Connector orientation matches OEM slot exactly; tabs align without forcing, and pack seats flush against the retention clip on the motherboard.
We bench-tested this cell in the AccuVote platform and confirmed clean charge acceptance on first insertion with no BMS fault codes.
After installation, run a full system self-test through the machine menu before deployment — voting equipment maps battery state during startup, and skipping this step causes premature low-battery flags on first use.
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

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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

3600mAh

Diebold AccuVote-TSX — 12V Ni-MH Replacement Battery (10HR-4/3FAU)

This 12V 3600mAh (43.2Wh) nickel-metal hydride battery replaces the backup power pack in Diebold AccuVote-TSX touch screen voting machines. It fits models listed under OEM part numbers 10HR-4/3FAU, 29-014509-000A-1, HHR-380AB27F10, and H450AE-10DB. The battery supports the machine's backup system during power fluctuations or outages at polling locations.

  • AccuVote-TSX platform fit: These machines share a common 12V backup rail and a standardised connector housing. The BMS handshake expects a Ni-MH pack at this voltage — substituting a different chemistry causes the machine's charge controller to reject the pack or misread state of charge.
  • Bench tested on actual hardware: We cycled this pack through charge and discharge on the AccuVote-TSX platform and confirmed the BMS accepted the new cells without fault codes. Cell voltage across the pack balanced within spec at full charge.
  • Pre-election conditioning: Run a full power-cycle test — power the machine on battery only, let it reach operational standby, then restore AC — before deploying to a polling location. The charge controller recalibrates its low-battery threshold during this sequence, and skipping it causes false low-battery alerts mid-election.

Why the AccuVote-TSX rejects a new pack after the battery sat in storage

Ni-MH cells self-discharge during storage. If the pack voltage drops below roughly 10V, the AccuVote-TSX charge controller sees it as a fault condition rather than a discharged battery. The controller then refuses to initiate a charge cycle. A short trickle-charge session at low current — some external chargers call this a "recovery" or "reconditioning" mode — brings the pack voltage back above the controller's acceptance threshold before you connect it to the machine.

Touch screen freezes or resets during active ballot session on battery power

The touch digitiser and display backlight together draw a sustained load that aging or partially discharged cells cannot hold steady. When cell voltage sags under that combined draw, the machine's internal regulator hits its lower limit and the processor resets. This is not a software fault — it is a voltage dropout event. Confirm the replacement pack reads at or above 13.8V immediately after a full charge cycle before placing the machine in service.

Compatible Models

TOUCH SCREEN VOTING MACHINES ACCUVOTE-TSX

Replaces Part Numbers

10HR-4/3FAU 29-014509-000A-1 HHR-380AB27F10 H450AE-10DB

Technical Specifications

Voltage12V
Amp Hours3600mAh
Capacity3600mAh
Rate43.2Wh
Net Weight506g /17.85 oz
Gross Weight646g /22.79 oz
Approximate Weight646g /22.79 oz
Dimension 168.50 x 69.00 x 17.20mm

Product Highlights

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

Frequently Asked Questions

The AccuVote-TSX won't start a charge cycle on the new battery — the indicator just stays off. What's wrong?

The machine's charge controller has a minimum voltage threshold, typically around 10V, before it will begin charging. A pack that sat in a warehouse dropped below that floor through self-discharge, and the controller reads it as a fault rather than a flat battery. Use an external Ni-MH charger with a recovery or reconditioning mode to bring the pack above 10.5V first. Once it crosses that threshold, reconnect it to the machine and the charge cycle will initiate normally.

The machine powers on fine but resets itself partway through a ballot session when running on battery backup — is that a BMS trip?

It's a voltage sag, not a BMS trip. The combined draw of the touch digitiser, display backlight, and processor pulls more current than a degraded or only partially charged pack can sustain at a stable voltage. When the pack sags below the regulator's lower limit, the processor loses clean power and resets. Charge the replacement pack to full before testing — it should read 13.8V or above immediately after the charger completes — then run a full battery-only power cycle to confirm the voltage holds steady under load.

The low-battery warning lights up almost immediately after switching to battery power, even though the pack was just charged. What causes that?

The AccuVote-TSX charge controller calibrates its low-battery threshold against the pack it learned on. When a new pack goes in without a conditioning cycle, the controller's reference point is still mapped to the old cells and misfires the warning at a higher voltage than needed. Run one complete power cycle on battery only — power the machine up, let it reach operational standby, then restore AC and let it charge to full. That sequence resets the threshold to match the new pack's actual discharge curve.

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