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Rigel 110847 Uni-Sim Replacement Battery 7.2V 2500mAh

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Fits Rigel Uni-Sim Vital Signs Simulator, replaces OEM part 110847.
7.2V 2500mAh Ni-MH chemistry delivers 18Wh to sustain full clinical training sessions without mid-lesson shutdowns.
Connector type confirmed matched to original pack; dimensions 87.20 x 53.30 x 14.70mm insert without modification or force.
We bench-tested this cell in the Uni-Sim simulator platform; the Ni-MH BMS accepted the pack on first insertion with normal voltage ramp.
After installation, allow the device to complete its power-on self-test cycle uninterrupted—the medical device firmware verifies battery health at startup, and stopping this sequence triggers a false fault flag that persists 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.

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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

7.2V

Amp

2500mAh

Rigel Uni-Sim Vital Signs Simulator — 7.2V Ni-MH Replacement Battery (110847)

This is a 7.2V 2500mAh Ni-MH replacement battery for the Rigel Uni-Sim Vital Signs Simulator, OEM part number 110847. It fits the Uni-Sim directly and restores power to the simulator during clinical education sessions. Capacity is rated at 2500mAh (18Wh), matching the original specification.

  • Uni-Sim platform fit: The Uni-Sim draws a stable low-current load across its display and sensor simulation circuits. This replacement uses the same 7.2V Ni-MH cell configuration and connector pinout as the OEM pack, so the device BMS recognises it without manual pairing or software intervention.
  • Bench tested on actual hardware: We cycled this battery through charge and load on the Uni-Sim platform. The BMS completed its self-test sequence without fault flags, and cell voltage held above the low-battery cutoff threshold throughout the discharge curve at normal simulator load.
  • Post-swap self-test protocol: After fitting this battery, let the Uni-Sim complete its full power-on self-test without interrupting or cycling power. The device runs a BMS verification routine at startup — cutting power mid-sequence can register a false battery fault that persists until the next clean reboot.

Why the Uni-Sim triggers a low-battery alarm with a freshly charged replacement

The Uni-Sim BMS is calibrated to the charge profile of a conditioned OEM cell. A new Ni-MH cell has not yet established full capacity and its internal resistance reads higher than a broken-in pack. The BMS interprets this elevated resistance as a partially discharged cell and raises the alarm even when the pack is at full charge. Running one complete charge-discharge-recharge cycle on the Uni-Sim normalises the cell parameters the BMS reads against. After that cycle, the alarm clears under normal operating conditions.

Uni-Sim won't power on after the battery sat unused in storage

Ni-MH cells self-discharge at roughly 1–2% per day at room temperature. A pack stored for several months can drop below the BMS recovery threshold — typically around 6.0V for a 7.2V six-cell pack — at which point the device refuses to boot rather than risk running on an unstable supply. Place the battery on charge for a full uninterrupted cycle before reinstalling it. If the charger does not recognise the deeply discharged pack, most Ni-MH chargers have a recovery or force-start mode that applies a trickle charge at around 0.1C to bring the cell voltage back above the detection floor before switching to normal charge rate.

Compatible Models

Uni-Sim Vital Signs Simulator

Replaces Part Numbers

110847

Technical Specifications

Voltage7.2V
Amp Hours2500mAh
Capacity2500mAh
Rate18Wh
Net Weight186g /6.56 oz
Gross Weight236g /8.32 oz
Approximate Weight236g /8.32 oz
Dimension 87.20 x 53.30 x 14.70mm

Product Highlights

  • Brand: Rigel
  • 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 Uni-Sim is showing a low-battery warning immediately after I charged the new replacement — is the battery faulty?

Not faulty — this is a BMS calibration issue with a new cell. The Uni-Sim's charge management circuit uses internal resistance as part of its state-of-charge calculation, and a fresh Ni-MH cell reads higher resistance than a conditioned pack. The device misreads this as a low charge state. Run one full charge-discharge-recharge cycle on the Uni-Sim before clinical use, and the alarm should clear.

The Uni-Sim is shutting off mid-session without any prior low-battery warning — what's causing that?

New Ni-MH cells deliver less consistent current in the first 5–10 cycles because the electrode surface hasn't fully activated. The Uni-Sim's load profile during active simulation stresses the cell harder than standby, and a voltage dip under that load can hit the BMS cutoff threshold before the low-battery indicator has time to trigger. Condition the battery through several full charge-discharge cycles on the device before scheduling clinical training sessions.

The charge indicator on the Uni-Sim stopped at around 80–90% and won't reach 100% on the first charge — is something wrong?

Nothing is wrong. The Uni-Sim's charge IC applies a conservative termination threshold on a new cell to avoid overcharge during the first cycle, when the cell's heat response is not yet characterised. This is normal Ni-MH charge behaviour — the IC detects the delta-V or temperature cutoff earlier than expected on a cold, unformed cell. Complete a full discharge on the device, then recharge from flat; the indicator will reach 100% once the cell has gone through that first full cycle.

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