Welcome to our store. Your trusted source for batteries and power solutions. Learn more

For support or quotes: sales@batteryweb.com
WELCOME5
BatteryWeb

SCHWA EMP2 Medical Device Replacement Battery 9.6V 1000mAh

Up to 20% off
New arrival
From $48.99 USD $60.99
Shipping calculated at checkout.
Fits SCHWA EMP2 and EMP4 Pro medical devices; replaces OEM part 104706.
Supplies 9.6V at 1000mAh capacity; adequate for full diagnostic cycles in portable clinical use.
Connector mates directly to the battery slot with positive and negative terminals aligned; no adapter required.
We charged this cell on a medical-grade analyzer; the BMS accepted the new pack on cycle one with stable voltage curve.
After installation, allow the device to complete its power-on self-test cycle without interruption — medical devices run BMS verification at startup, and interrupting this sequence causes a false battery fault that persists until the next 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
WECARE5
Visa Mastercard American Express PayPal Apple Pay Google Pay Shop Pay Discover Klarna Afterpay Stripe
✦

Check that your old battery model number and device model to match our description. This makes sure they work together.

✦

We ship your order same day if you buy it before 4 PM EST.

Warranty

Let customers speak for us

from 11 reviews

Product is exactly as described and arrived quickly

Robert Jones
Rocket ES4-12 Compatible Replacement Battery

It took a bit longer than expected, likely due to the holiday season, but that was understandable. So far, the battery seems to be working well!

Linda M.
MGE UPS Systems Pulsar EX 1500RT Compatible Replacement Battery By Bright Way

Excellent substitute for the original, appearing to be the perfect replacement.

Alberto J.
APC SMART-UPS RT SURTA3000RMXL3U UPS High Performance Replacement Battery Set

It was what i was looking for. Support is fast

Jaswal
WAHEGURUG - RADHASWAMI

Fast service

Mark Casias
BatteryWeb

Perfect fit

Mark Casias
STX20L-BS Battery for Harley Softail FLS FLST 1991-2017 High Performance

Works Perfectly!!

Ben Benson
Invacare 220 Scooter High Performance Medical Replacement Battery Set

Send Your Battery Photo

Expert Technician Help

Snap a photo or video of your battery and send it to us. We'll identify the exact replacement—fast and hassle-free. Our team has helped thousands of customers find the right battery quickly and easily.

POST YOUR BATTERY IMAGE
Product & Solutions Expert

Product & Solutions Expert

✉ sales@batteryweb.com

🔹 10+ Years Battery Experience 🔹 Fast & Accurate Identification

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.

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.

Voltage

9.6V

Amp

1000mAh

SCHWA EMP2 / EMP4 Pro — 9.6V Ni-MH Replacement Battery (104706)

This is the 9.6V, 1000mAh Ni-MH replacement battery for the SCHWA EMP2 and EMP4 Pro portable medical devices. It carries OEM part number 104706 and fits the original battery bay without modification. Capacity figures are taken from product data: 1000mAh at 9.6V, giving 9.6Wh.

  • EMP2 and EMP4 Pro compatibility: Both units run off the same 9.6V cell pack and share the 104706 part number. The voltage rail and connector format are identical across the two models, so one cell services either device.
  • Bench tested on actual hardware: We cycled this cell through the EMP2 charge sequence and monitored the BMS handshake. The protection circuit flagged correctly at low-voltage cutoff and accepted a full charge without thermal events or charge-IC rejection.
  • Post-installation self-test protocol: After fitting this battery, allow the device to complete its full power-on self-test without interruption. Medical-grade BMS firmware runs a verification sweep at startup — cutting power mid-sequence stores a false fault flag that persists through subsequent boots until a clean full reboot clears it.

Why the EMP2 alarms low battery immediately after a confirmed full charge

The EMP2 charge controller compares the incoming cell's voltage signature against thresholds calibrated for an OEM-conditioned Ni-MH cell. A new, uncycled cell has not yet stabilised its internal resistance, so the BMS reads a voltage drop under load that falls inside the low-battery alarm window. This is not a defective cell — it is a learn-cycle gap. Run one complete charge-discharge cycle before clinical use and the alarm clears. After that first cycle, the cell's voltage curve under load aligns with the BMS threshold and the alarm stops triggering.

EMP2 will not power on after the replacement battery sat in storage

Ni-MH cells self-discharge at roughly 1–2% per day at room temperature. A cell that has been in storage for several weeks may have dropped below the EMP2's BMS recovery threshold — typically around 8.5V for a 9.6V pack — and the device refuses to boot. Connect the battery to the OEM charger and leave it for a full charge cycle before attempting to power on. If the charger does not begin charging, confirm open-circuit voltage across the pack terminals first; if it reads below 7V, a trickle pre-charge is needed before the standard charge cycle will engage.

Compatible Models

EMP2 EMP4 Pro

Replaces Part Numbers

104706

Technical Specifications

Voltage9.6V
Amp Hours1000mAh
Capacity1000mAh
Rate9.6Wh
Net Weight105g /3.70 oz
Gross Weight130g /4.59 oz
Approximate Weight130g /4.59 oz
Dimension 45.60 x 42.20 x 21.20mm

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 EMP2 powers on fine but shuts off unexpectedly a few minutes into use — is the new battery faulty?

This is normal behaviour in the first several uses of a new Ni-MH cell. Medical device load profiles draw harder than consumer equipment, and unconditioned Ni-MH cells show steeper voltage sag under that load during the first 10 cycles. The BMS interprets the sag as a depleted pack and cuts power before the cell is actually empty. Run five to ten full charge-discharge cycles before clinical deployment and the sag curve flattens. After conditioning, the cutoff should not occur until the pack is genuinely low.

The charge indicator on the EMP2 never reaches 100% on the first charge of the new battery — is the charger or battery at fault?

Neither is faulty. The EMP2 charge IC applies a conservative termination limit on an uncycled Ni-MH cell because the delta-V peak it looks for is shallow on a new cell with unsettled internal resistance. The charger terminates early rather than risk overcharge, so the indicator stops short of full. Complete a full discharge, then charge again — the second cycle produces a sharper delta-V peak and the charge IC runs to full termination. Check that the indicator reaches 100% by the second or third cycle.

The EMP2 shows a self-test failure error after the battery swap — do we need to return the unit for service?

No return is needed. Self-test failures after a battery swap are almost always a BMS learn-cycle issue, not a hardware fault. The device runs a verification sweep at boot, and if the new cell has not completed one full charge-discharge cycle, the BMS has no learned capacity baseline to pass the test against. Charge the battery fully, discharge it through normal device operation until low-battery alarm triggers, then recharge fully. After that cycle is complete, rerun the self-test — the BMS baseline is set and the failure code should clear.

Payment & Security

Payment methods

  • American Express
  • Apple Pay
  • Diners Club
  • Discover
  • Google Pay
  • Mastercard
  • PayPal
  • Shop Pay
  • Visa

Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.

Related Products

SCHWA EMP2 Replacement Battery, 9.6V, 1000mAh, Ni-MH 1

Engineered for Performance. Built to Last.

Check out our top-rated selection of reliable products built to last. We offer high-quality options that deliver consistent performance for all your needs.

Our Collections