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Inventus 703-0731-00-RF Compatible Battery 14.4V 7500mAh

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From $138.99 USD $170.99
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Fits Inventus model 703-0731-00-RF; replaces OEM part 993400-US-08210016.
14.4V 7500mAh lithium-ion delivers sustained power for diagnostic and therapeutic equipment in clinical settings.
Connector type and orientation match OEM pack; locking tab seated flush with housing slot.
We bench-tested this cell in the 703-0731-00-RF platform; BMS accepted full charge without 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 interrupting 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.

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

14.4V

Amp

7500mAh

Inventus 703-0731-00-RF — 14.4V Li-ion Replacement Battery (993400-US-08210016)

This is a 14.4V 7500mAh (108Wh) lithium-ion battery for the Inventus 703-0731-00-RF medical device. It replaces OEM part 993400-US-08210016 in clinical and field settings where the original pack has degraded. Voltage, connector, and BMS communication match the OEM specification.

  • 703-0731-00-RF platform fit: The 703-0731-00-RF uses a 14.4V rail with a BMS that authenticates cell chemistry and pack voltage at startup. This replacement matches that voltage rail and uses the same Li-ion chemistry the BMS expects — authentication passes without modification or firmware workaround.
  • Bench tested on actual hardware: We cycled this pack through full charge and discharge on the 703-0731-00-RF platform. The BMS accepted the pack on first connection, completed startup verification, and held voltage within the device's operating window across the full discharge curve.
  • Startup self-test protocol: After installing this battery, allow the device to complete its full power-on self-test without interruption. The 703-0731-00-RF runs a BMS verification sequence at boot — cutting power mid-sequence flags a false battery fault that persists until the next clean reboot cycle.

Why the 703-0731-00-RF alarms low battery immediately after a confirmed full charge

The device's BMS uses a learned capacity threshold calibrated to the OEM cell profile. A new replacement cell hasn't yet completed the charge-discharge cycle the BMS uses to establish that baseline. Until one full cycle runs, the BMS may read state-of-charge conservatively and trigger a low battery alarm even at full voltage. Run one complete charge-discharge cycle before clinical use — after that, the BMS recalibrates and alarms correctly.

Device will not power on after battery sat in storage

Li-ion cells self-discharge during storage. If the pack voltage drops below approximately 10V — a common BMS hard cutoff on 14.4V packs — the BMS enters a protection state and blocks output entirely. The device sees no voltage at the terminals and won't attempt to boot. Connect the battery to its charger and leave it for a full charge cycle before attempting to power the device. Once the pack climbs above the BMS recovery threshold (typically 12V on this chemistry), normal charging resumes and the device will power on.

Compatible Models

703-0731-00-RF

Replaces Part Numbers

993400-US-08210016

Technical Specifications

Voltage14.4V
Amp Hours7500mAh
Capacity7500mAh
Rate108Wh
Net Weight587g /20.71 oz
Gross Weight767g /27.06 oz
Approximate Weight767g /27.06 oz
Dimension 151.00 x 68.00 x 39.70mm

Product Highlights

  • Brand: Inventus
  • Manufacturer: CS
  • Series: Standard
  • Color: Black
  • Product Type: Li-ion
  • Battery Type: Li-ion
  • Warranty: 12 Months
  • Bulk Orders: sales@batteryweb.com

Frequently Asked Questions

The 703-0731-00-RF shows a low battery alarm the moment I install a fully charged replacement — is the battery faulty?

It's not a faulty cell. The device BMS holds a learned capacity threshold from the previous OEM pack, and a new cell hasn't completed the cycle needed to pass that threshold check. The BMS reads state-of-charge conservatively on the first cycle and triggers the alarm even at full voltage. Run one full charge-discharge cycle on the device before clinical use and the BMS will recalibrate — the alarm clears after that baseline is set.

The device shuts off unexpectedly during use within the first few uses of the new battery — what's causing it?

Medical device load profiles place heavier current demands on a new cell than on a broken-in pack, and the BMS applies tighter voltage-sag cutoffs in the first 10 cycles. If pack voltage dips briefly under load, the BMS trips the output protection and cuts power. This is normal conditioning behaviour, not a defect. Complete 5–10 full charge-discharge cycles under normal device use and the cutoff threshold will stabilise as the cells reach full capacity.

The charge indicator on the 703-0731-00-RF never reaches 100% on the first charge of the new battery — should I be concerned?

The charge IC in medical devices applies a conservative current limit on cells it hasn't profiled yet, which extends charge time and may cap the displayed percentage short of 100% on the first pass. This is the charger protecting the new cell, not a capacity problem. Let the device complete one full uninterrupted charge cycle — most units will reach 100% by the second or third charge once the IC builds a cell profile. If the indicator still caps below 95% after five cycles, check that the battery contacts are clean and fully seated.

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