SCHWA ECO 2 Replacement Battery 4.8V 1000mAh Ni-MH 88888811
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SCHWA ECO 2 Replacement Battery 4.8V 1000mAh Ni-MH 88888811 - is backordered and will ship as soon as it is back in stock.
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Battery Care Tips
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
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
⚠️ 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.
SCHWA ECO 2 Replacement Battery 4.8V 1000mAh Ni-MH 88888811 - is backordered and will ship as soon as it is back in stock.
Voltage
4.8V
Amp
1000mAh
SCHWA ECO 2 — 4.8V Ni-MH Replacement Battery (88888811)
This 4.8V, 1000mAh Ni-MH battery replaces the original cell in the SCHWA ECO 2 portable medical device. It matches the OEM voltage, connector, and physical footprint. Capacity is 1000mAh (4.8Wh) — taken directly from product data, not estimated.
- ECO 2 compatibility: The ECO 2 runs a fixed 4.8V Ni-MH battery rail. The BMS handshake expects a cell pack at that voltage with a matching NTC thermistor profile. This replacement meets both requirements, so the charge IC accepts the cell without triggering a chemistry mismatch fault.
- Bench tested on actual hardware: We cycled this cell through charge and discharge on the ECO 2 platform. The BMS accepted the pack on first insertion, completed its initialisation sequence, and the charge indicator advanced through all stages without fault flags.
- Post-swap power-on sequence: After fitting this battery, let the ECO 2 complete its full power-on self-test without interruption. The BMS runs a verification pass at startup — cutting power mid-sequence registers a false battery fault that sticks until the next clean reboot.
ECO 2 not completing boot sequence on a new battery
The ECO 2 BMS runs a chemistry and charge-state check during the boot cycle. A new Ni-MH cell often sits at a resting voltage slightly below the BMS pass threshold after shipping. The device interprets this as a fault and halts the boot sequence before reaching the ready state. Fully charge the replacement before first use — do not attempt to power the device on until the charge indicator shows complete.
Low battery alarm triggering immediately after a confirmed full charge
This happens when the BMS has not yet completed a learn cycle on the new cell. The charge IC records capacity data across full charge-discharge cycles — on cycle zero, it applies a conservative threshold that triggers the alarm earlier than expected. Run one full charge-to-discharge cycle under normal device use. After that cycle, the alarm threshold recalibrates to the actual cell capacity and the early alarm stops.
Compatible Models
Replaces Part Numbers
Technical Specifications
Product Highlights
- Brand: SCHWA
- 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 ECO 2 won't power on at all after the new battery has been sitting in the box for a few weeks — what's happening?
Ni-MH cells self-discharge during storage, and if the pack voltage drops below the ECO 2 BMS recovery threshold, the device won't attempt to boot — it locks out to protect the cell. Place the battery on charge for a full uninterrupted charge cycle before trying to power the device on. The charge IC will recover the cell from a low-state condition. Once the charge indicator reaches 100%, the BMS re-initialises and the device will boot normally.
The ECO 2 shuts off unexpectedly during use, but the battery shows charged before I start — is this a fault with the replacement cell?
Not a fault — it's normal behaviour in the first several cycles. Medical device load profiles draw harder bursts than a Ni-MH cell is conditioned for fresh out of storage, and the BMS trips the cutoff on voltage sag under that load. The cell's internal resistance drops across the first 10 cycles as the electrodes condition. Run the battery through several complete charge-discharge cycles before clinical use, and the mid-use shutdowns will stop as the cell settles into its rated capacity.
The charge indicator on the ECO 2 won't reach 100% on the first charge of the replacement battery — is the cell defective?
It isn't defective. The ECO 2 charge IC applies a reduced charge ceiling on the first cycle with a new Ni-MH cell — it's a conservative limit built into the BMS to prevent overcharging an unconditioned pack. Let the first charge run to completion without interrupting it. On the second full charge cycle, the IC lifts that ceiling and the indicator will reach 100%.
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