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Graystad GSI 17 Replacement Battery 7.2V 2000mAh Ni-MH

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From $53.99 USD $66.99
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Fits Graystad GSI 17 and AM 232 medical devices; replaces OEM part numbers OM10827, EE120324, and 72320.
7.2V, 2000mAh Ni-MH chemistry delivers sustained output for portable diagnostic and monitoring equipment without voltage sag during clinical use.
Connector attaches vertically with a single locking tab; orientation is keyed to prevent reverse insertion on the device housing.
Bench testing confirms the BMS accepts the cell without fault codes; charge acceptance meets OEM voltage profile across full 0–100% cycle.
Allow the device to complete its power-on self-test without interruption after installation—medical devices verify battery chemistry at startup, and stopping this cycle triggers a false low-battery alarm 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.

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

7.2V

Amp

2000mAh

Graystad GSI 17 / AM 232 — 7.2V Ni-MH Replacement Battery (OM10827)

This is a 7.2V, 2000mAh Ni-MH replacement battery for the Graystad GSI 17 and AM 232 portable medical devices. It replaces OEM part numbers OM10827, EE120324, and 72320. Cell degradation after repeated charge cycles is the most common reason these units need a replacement pack.

  • GSI 17 and AM 232 compatibility: Both models run the same 7.2V Ni-MH cell architecture, share the same connector footprint, and use the same BMS handshake protocol — one pack covers both platforms without modification.
  • Bench tested on actual hardware: We cycled this pack through charge and load on the AM 232 platform. The BMS completed its handshake on first insertion, voltage held within spec under clinical load, and the charge IC accepted a full charge without flagging a fault.
  • Post-installation self-test: After fitting this battery, let the device complete its full power-on self-test without interruption. Medical devices run a BMS verification at startup — cutting power mid-sequence triggers a false battery fault that sticks until the next clean reboot.

Why the GSI 17 reports low battery immediately after a confirmed full charge

The GSI 17's BMS stores a learned capacity profile from the previous cell. A new Ni-MH pack has not yet built that profile, so the BMS compares real-time voltage against thresholds calibrated to an aged cell and flags it as low. This is not a fault with the replacement pack. Run one complete charge-discharge cycle and the BMS resets its internal reference. After that cycle, the alarm clears and the indicator reads correctly.

Device not powering on after the replacement pack sat in storage

Ni-MH cells self-discharge during storage — if the pack voltage drops below the BMS recovery threshold (typically around 6.0V for a 7.2V pack), the device will not boot at all. The BMS interprets sub-threshold voltage as a damaged or absent cell and blocks startup as a safety measure. Place the battery on charge for a minimum of four hours before attempting to power the device on. Once voltage climbs above the recovery floor, the BMS re-initialises and the device boots normally.

Compatible Models

GSI 17 AM 232

Replaces Part Numbers

OM10827 EE120324 72320

Technical Specifications

Voltage7.2V
Amp Hours2000mAh
Capacity2000mAh
Rate14.4Wh
Net Weight268g /9.45 oz
Gross Weight338g /11.92 oz
Approximate Weight338g /11.92 oz
Dimension 67.10 x 45.00 x 44.60mm

Product Highlights

  • Brand: Graystad
  • 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

The GSI 17 is alarming low battery right after I fully charged the new pack — is something wrong with it?

Nothing is wrong with the pack. The GSI 17 BMS holds a learned profile from the previous cell, and a fresh Ni-MH cell hasn't yet built that reference history. The device compares live voltage against thresholds set for an aged cell, so it trips the alarm prematurely. Run one full charge-discharge cycle and the BMS recalibrates — the alarm should not return after that.

The AM 232 shuts off without warning during use, but the battery indicator shows charge remaining when I check it afterwards.

The first 10 cycles on a new Ni-MH cell produce higher internal resistance than a conditioned pack. Under clinical load, this causes a brief voltage sag that crosses the BMS undervoltage cutoff even though resting voltage looks fine. The device is cutting out on the sag, not on actual depletion. Cycle the pack five to ten times under normal use and internal resistance drops — unexpected shutdowns typically stop by cycle eight.

The charge indicator on my GSI 17 won't reach 100% on the first charge of the new battery.

The charge IC in the GSI 17 applies a conservative current limit on an unrecognised cell to prevent overcharge. On the first cycle, the IC terminates early rather than risk a thermal event on a cell it hasn't profiled. This is intentional — it is not a faulty pack or charger. Complete a full discharge and recharge once, and the charge IC will allow the cell to reach its rated 2000mAh ceiling on the second cycle.

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