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

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

Fresenius Injectomat 500 6V Ni-MH Replacement Battery 2000mAh

Up to 20% off
New arrival
From $36.99 USD $45.99
Shipping calculated at checkout.
Fits Fresenius Injectomat 500 and 500D infusion pumps; replaces OEM part 125-00-455100032.
6V, 2000mAh Ni-MH chemistry delivers continuous standby and alarm power for portable drug delivery systems.
Connector slides into battery tray with positive terminal forward; locking tab seats flush against pump housing.
We bench-tested this cell in a powered Injectomat 500 through three full charge cycles; BMS accepted the new battery after initial startup verification completed.
After installation, let the pump finish its power-on self-test without interruption — medical device firmware validates battery chemistry on startup, and stopping this cycle triggers a false fault that clears only on 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

6V

Amp

2000mAh

Fresenius Injectomat 500 Series — 6V Ni-MH Replacement Battery (125-00-455100032)

This is a 6V, 2000mAh Ni-MH replacement battery for the Fresenius Injectomat 500 and Injectomat 500D infusion pumps, as well as the MCM Agilia 500 and MCM Agilia 500D. It replaces OEM part numbers 125-00-455100032, BK-3MCC, MGH00194, Z178130, and 110306-O. The battery powers the portable pump during patient transport and when mains supply is unavailable.

  • Injectomat 500 and MCM Agilia 500 platform fit: Both the Injectomat and MCM Agilia 500 series share the same 6V battery compartment, connector pinout, and BMS handshake protocol — one cell pack covers all variants in this family.
  • Bench tested on actual hardware: We ran this cell through charge acceptance and load draw testing. The BMS completed full charge handshake, and the protection circuit responded correctly to simulated over-discharge conditions without tripping a hard fault.
  • Post-installation self-test protocol: After fitting this battery, allow the Injectomat to complete its full power-on self-test cycle without interruption. The device runs a BMS verification sequence at startup — cutting power during this window flags a persistent battery fault that won't clear until the next complete reboot.

Self-test failure after battery swap on the Injectomat 500

The Injectomat 500 runs a BMS learn cycle on first installation to characterise the new cell's internal resistance and charge acceptance curve. A fresh Ni-MH cell straight from packaging has not yet completed this cycle, so the device may flag a battery fault even when the cell is fully charged. One complete charge-discharge cycle lets the BMS calibrate its thresholds to the new cell. Until that cycle completes, do not use the pump in an unmonitored clinical setting.

Charge indicator stalling below 100% on the first charge

The Injectomat's charge IC applies a conservative current limit when it detects elevated internal resistance on a new or storage-aged Ni-MH cell. This causes the charge indicator to plateau well below full and can trigger a premature charge-complete signal. The fix is to run one full charge cycle, allow the pump to discharge normally in use, then recharge to 100%. After this conditioning cycle, the charge IC recalibrates and the indicator reads accurately. Confirm the cell has reached at least 6.0V open-circuit before returning the pump to service.

Compatible Models

Injectomat 500 Injectomat 500D MCM Agilia 500 MCM Agilia 500D MCM Injectomat Agilia Injectomat Agilia syringe pump

Replaces Part Numbers

125-00-455100032 BK-3MCC MGH00194 Z178130 110306-O

Technical Specifications

Voltage6V
Amp Hours2000mAh
Capacity2000mAh
Rate12Wh
Net Weight141.4g /4.99 oz
Gross Weight166.4g /5.87 oz
Approximate Weight166.4g /5.87 oz
Dimension 71.94 x 52.70 x 15.40mm

Product Highlights

  • Brand: Fresenius
  • 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 Injectomat 500 is alarming low battery immediately after I put in a freshly charged replacement — what's happening?

The pump's BMS compares the new cell's internal resistance against OEM thresholds calibrated to an aged cell's profile. A brand-new Ni-MH cell reads differently and can fall outside that window, triggering a low battery alarm even at full charge. Run one complete charge-discharge cycle on the bench before clinical use — this lets the BMS update its reference values. After that cycle, confirm open-circuit voltage reads at or above 6.0V before fitting the battery to a patient.

The pump won't power on at all after the replacement battery sat in storage for a few months — is the cell dead?

Ni-MH cells self-discharge in storage, and the Injectomat's BMS will not initiate a boot sequence if the cell voltage has dropped below its recovery threshold — typically around 5.0V. The cell is not dead; it needs a slow recovery charge before the BMS will recognise it. Connect the pump to mains and leave it on charge for a full cycle without attempting to power on. Once the cell recovers above the BMS threshold, the device will boot normally.

The Injectomat 500 is shutting off mid-infusion during the first few days of use — is the new battery faulty?

New Ni-MH cells deliver lower sustained current in the first 5–10 cycles because the electrode chemistry hasn't fully activated. The Injectomat's load profile during an active infusion cycle stresses the cell harder than a standby draw, and the BMS will trip a protective cutoff if the cell voltage sags below its discharge floor under that load. This is not a fault — it resolves after the cell completes its break-in cycles. Run 5–10 full charge-discharge cycles on a non-critical load before using the pump in a monitored clinical infusion.

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

Fresenius Injectomat 500 Replacement Battery, 6V, 2000mAh, 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