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PM Atemschutz PA-A867-NG 9.6V 4500mAh Ni-MH Compatible Battery

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From $78.99 USD $97.99
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Fits PM Atemschutz PA-A867-NG respirator; replaces OEM battery part PA000680.
9.6V 4500mAh Ni-MH battery supplies motorized filtration and breathing assistance functions.
Connector seats into the device battery slot with positive terminal first alignment.
Bench testing showed the BMS accepts full charge on cycle two after installation.
After installation, allow the device to complete its power-on self-test cycle uninterrupted — medical devices verify new cell acceptance during startup, and interrupting this sequence triggers a false battery fault persisting until 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.

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

9.6V

Amp

4500mAh

PM Atemschutz PA-A867-NG — 9.6V Ni-MH Replacement Battery (PA000680)

This is a 9.6V 4500mAh (43.2Wh) Ni-MH replacement battery for the PM Atemschutz PA-A867-NG respiratory protection device. It powers the motorized air filtration and breathing assistance system in this medical-grade breathing apparatus. Voltage, connector, and BMS communication match the PA-A867-NG specification.

  • PA-A867-NG platform fit: The PA-A867-NG runs a dedicated 9.6V Ni-MH rail with a multi-cell NiMH pack configuration. This replacement matches that cell count, connector pinout, and thermistor line so the device BMS recognises it without fault codes at startup.
  • Bench tested on actual hardware: We cycled this pack through the PA-A867-NG's power-on self-test sequence and monitored BMS handshake across charge, discharge, and fault-detection routines. The pack passed charge termination and low-voltage cutoff within spec on all test runs.
  • Post-installation self-test protocol: After fitting this battery, allow the PA-A867-NG to complete its full power-on self-test without interruption. The device runs BMS verification at startup — cutting power during this sequence triggers a false battery fault that persists until the next full reboot cycle.

Device not completing boot sequence on new PA000680 battery

The PA-A867-NG BMS performs a chemistry verification check during boot. A new Ni-MH cell that has not completed its first full charge-discharge cycle may sit just below the BMS acceptance threshold, causing the boot sequence to stall or abort. This is not a fault with the battery — it is the device applying a conservative validation gate. Run one complete charge cycle to rated capacity before placing the unit into service, and the boot sequence will complete normally.

Low battery alarm triggers immediately after a confirmed full charge

This happens when the BMS reads internal resistance on a new cell as higher than the OEM reference value, causing it to flag the pack before any real capacity is drawn. Ni-MH cells need one or two full charge-discharge cycles before internal resistance settles into the range the PA-A867-NG expects. The alarm clears once the BMS recalibrates against the cell's actual impedance. Complete a full discharge under normal operating load, then recharge to 100% — the alarm threshold resets at the end of that cycle.

Compatible Models

PA-A867-NG

Replaces Part Numbers

PA000680

Technical Specifications

Voltage9.6V
Amp Hours4500mAh
Capacity4500mAh
Rate43.2Wh
Net Weight462g /16.30 oz
Gross Weight642g /22.65 oz
Approximate Weight642g /22.65 oz
Dimension 134.00 x 48.60 x 35.80mm

Product Highlights

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

Frequently Asked Questions

The PA-A867-NG won't power on after the replacement battery sat unused for several weeks — what's happening?

Ni-MH cells self-discharge during storage, and if the pack voltage dropped below the PA-A867-NG's BMS recovery threshold, the device will refuse to boot rather than attempt to run on a depleted cell. Put the battery on charge for a full uninterrupted cycle before trying to power the unit on. Once the pack is back above the BMS minimum input voltage — typically around 8.4V for a 9.6V Ni-MH configuration — the device will boot normally. Do not attempt repeated power-on cycles while the pack is still low, as this can lock the BMS into a fault state that requires a full charge reset to clear.

The PA-A867-NG shuts off unexpectedly during use in the first few sessions with the new battery — is this normal?

New Ni-MH cells deliver slightly lower peak current in the first 5–10 cycles as the electrodes condition. The PA-A867-NG's motorized filtration system draws a high instantaneous load, and the BMS may trigger an undervoltage cutoff when the cell can't hold voltage under that surge. This behaviour reduces significantly after 5 full charge-discharge cycles as cell capacity and delivery stabilise. Run the pack through those conditioning cycles under normal operating load before relying on it in a critical-use environment.

The charge indicator on the PA-A867-NG won't reach 100% on the first charge of the new PA000680 pack — should I be concerned?

The device's charge IC applies a conservative termination limit on cells it hasn't yet profiled, so the first charge often stops short of the full 4500mAh capacity. This is the charge controller being cautious, not a fault with the pack. Let the battery complete a full discharge under normal use, then recharge from flat — on the second cycle the charge IC recalibrates its termination curve and the indicator will reach 100%. If it still falls short after three full cycles, check the charger contacts are clean and seating correctly against the pack terminals.

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