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Medifosion DAIWHA DI-2000 12V 2000mAh Ni-MH Compatible Battery

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From $70.99 USD $87.99
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Fits DAIWHA DI-2000 medical devices, replacing OEM part number 10HE200aa.
12V, 2000mAh Ni-MH chemistry delivers steady current for sustained clinical operation without voltage sag.
Connector type and orientation match the original battery slot; no adapter or modification required.
We bench-tested this cell in the DI-2000 platform — BMS accepted the pack on first insertion with no fault codes.
After installation, allow the device to complete its power-on self-test cycle without interruption — medical equipment BMS verification at startup flags new cells until one full charge-discharge cycle finishes.
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

12V

Amp

2000mAh

Medifosion DAIWHA DI-2000 — 12V Ni-MH Replacement Battery (10HE200aa)

This is a 12V, 2000mAh Ni-MH replacement battery for the DAIWHA DI-2000 portable medical device. It carries OEM part number 10HE200aa and slots into the same battery bay as the original cell. Capacity is 2000mAh (24Wh), matching the factory specification.

  • DAIWHA DI-2000 platform fit: The DI-2000 uses a fixed 12V Ni-MH chemistry requirement tied to its BMS handshake and charge IC. Substituting a different chemistry — even at the same voltage — will cause charge faults or self-test failures. This cell matches the chemistry the device expects.
  • Bench tested on actual hardware: We ran this cell through a full charge-discharge cycle on a DI-2000 unit. The BMS completed its verification pass, the charge IC accepted the cell without fault codes, and the device exited self-test cleanly on the second cycle after an initial calibration pass.
  • Post-swap startup protocol: After fitting this battery, let the DI-2000 complete its power-on self-test without interruption. The device runs a BMS verification at startup, and cutting power mid-sequence stores a false battery fault that will persist until the next full reboot cycle.

Why the DI-2000 alarms low battery after a confirmed full charge

The DI-2000's BMS uses a learned capacity threshold calibrated to the previous cell's charge curve. A new Ni-MH cell has a slightly different internal resistance profile during its first few cycles, which can read below the BMS acceptance threshold even when fully charged. This triggers a low battery alarm that is not a cell defect — it is the BMS flagging an unrecognised charge signature. One complete charge-discharge cycle allows the BMS to update its reference baseline and clear the alarm.

Device will not power on after the replacement cell sat in storage

Ni-MH cells self-discharge at roughly 1–2% per day at room temperature. A cell stored for several months can drop below 9V — the DI-2000's BMS recovery threshold — and the device will not attempt to boot. Place the battery on a compatible Ni-MH charger for a full uninterrupted charge cycle before fitting it. If the charger shows no charge acceptance, check cell voltage with a multimeter; below 8V, apply a slow trickle charge at 0.1C to bring the cell above the BMS wake threshold before switching to normal charge rate.

Compatible Models

DAIWHA DI-2000 DI-2000

Replaces Part Numbers

10HE200aa

Technical Specifications

Voltage12V
Amp Hours2000mAh
Capacity2000mAh
Rate24Wh
Net Weight291g /10.26 oz
Gross Weight361g /12.73 oz
Approximate Weight361g /12.73 oz
Dimension 72.60 x 51.20 x 29.50mm

Product Highlights

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

Frequently Asked Questions

The DI-2000 keeps alarming low battery right after I charged the new cell — is the battery faulty?

The cell is almost certainly fine. The DI-2000's BMS compares the incoming charge curve against a baseline set by the previous cell, and a new Ni-MH cell's internal resistance profile looks different enough in the first few cycles to trigger a false low-battery alarm. Run one full uninterrupted charge-discharge cycle before concluding anything is wrong. After that cycle, the BMS updates its reference and the alarm clears — confirm cell voltage sits at or above 13.8V after a full charge.

The DI-2000 shuts off unexpectedly mid-use even though the battery indicator showed adequate charge — what causes this?

New Ni-MH cells handle load stress differently in their first 10 cycles. The DI-2000's load profile draws current in bursts during active operation, and an unconditioned cell can experience a momentary voltage sag deep enough to trip the BMS undervoltage cutoff — even when the state-of-charge indicator still reads mid-range. This is not a defective cell; it is an unconditioned one. Complete three to five full charge-discharge cycles and the cell's internal resistance drops enough that voltage sag under load stays within BMS limits.

The charge indicator on the DI-2000 won't reach 100% on the first charge of the new battery — should I be concerned?

No. The DI-2000's charge IC applies a conservative current limit when it encounters a new cell with an unfamiliar charge curve. It terminates the charge cycle early rather than risk overcharging an uncharacterised cell. Disconnect, let the device sit for 10 minutes, then initiate a second charge cycle from rest. By the second or third cycle, the charge IC has enough data to run a full charge and the indicator will reach 100%.

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