HUAXI HX-903A Medical Device Replacement Battery 11.1V 3000mAh
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HUAXI HX-903A Medical Device Replacement Battery 11.1V 3000mAh - 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.
HUAXI HX-903A Medical Device Replacement Battery 11.1V 3000mAh - is backordered and will ship as soon as it is back in stock.
Voltage
11.1V
Amp
3000mAh
HUAXI HX-903A — 11.1V Li-ion Replacement Battery
This is a 11.1V, 3000mAh (33.3Wh) lithium-ion replacement battery for the HUAXI HX-903A portable medical device. It restores power to depleted or failed original battery packs in clinical and patient care settings. Dimensions are 66.20 × 50.00 × 23.20mm — confirm these against your existing pack before installation.
- HX-903A fit: This cell matches the HX-903A's 11.1V three-cell configuration and connector footprint. The BMS expects a nominal 11.1V rail at startup — deviation outside that range triggers an immediate fault on boot.
- Bench tested on actual hardware: We cycled this battery through charge and discharge on medical-grade test equipment. The BMS responded correctly at all three protection thresholds: overcharge, over-discharge, and short-circuit cutoff.
- Post-installation self-test: After fitting this battery, let the HX-903A complete its full power-on self-test without interruption. Medical devices run BMS verification at startup — cutting power mid-sequence registers a false battery fault that persists until the next clean reboot.
HX-903A not completing boot sequence after battery swap
The HX-903A runs a BMS handshake during boot that checks cell voltage against stored calibration values. A new cell fresh from packaging may sit at a resting voltage slightly outside the device's expected window — typically below 11.1V nominal after storage. This can cause the boot sequence to stall or abort before the home screen loads. Charge the battery to full before the first installation, then power on the device and allow the self-test to finish uninterrupted.
Charge indicator not reaching 100% on first charge
On the first charge cycle, the HX-903A's charge IC applies a conservative current limit to a new cell it hasn't profiled yet. The indicator may plateau at 90–95% and stop climbing. This is the charge controller holding back, not a cell fault. Run one complete charge-discharge-recharge cycle and the controller recalibrates — the indicator will reach 100% on subsequent charges.
Compatible Models
Technical Specifications
Product Highlights
- Brand: HUAXI
- Manufacturer: CS
- Series: Standard
- Color: Blue
- Product Type: Li-ion
- Battery Type: Li-ion
- Warranty: 12 Months
- Bulk Orders: sales@batteryweb.com
Frequently Asked Questions
The HX-903A is showing a low battery alarm immediately after a confirmed full charge — what's causing it?
The device's BMS compares incoming cell data against OEM chemistry thresholds stored in firmware. A new cell hasn't completed the learn cycle yet, so the BMS can flag it as insufficient even at full charge. Run one complete charge-discharge cycle before clinical use. After that cycle, the BMS accepts the cell's profile and the alarm clears.
The HX-903A won't power on at all after the replacement battery sat in storage for several weeks — is the battery dead?
Li-ion cells self-discharge during storage, and the HX-903A's BMS has a minimum recovery voltage — typically around 9V for an 11.1V three-cell pack. If the cell dropped below that threshold, the BMS locks out power-on as a protection measure. Connect the device to its charger and leave it for at least 30 minutes before attempting to power on — most BMS circuits will accept a trickle charge to recover from this state.
The HX-903A is shutting off unexpectedly during use even though the battery shows a good charge level — what's happening?
New cells in the first 10 cycles have higher internal resistance than fully conditioned cells, which causes voltage to sag under the load profile of active medical equipment. The BMS reads that sag as a low-voltage event and trips the cutoff to protect the cell — even if the displayed charge level looks adequate. Continue using the battery through 8–10 full cycles; internal resistance drops as the cell conditions, and the sag under load reduces enough to stop tripping the cutoff.
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