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

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

Welch-Allyn CP200 ECG Replacement Battery 6.4V 6000mAh

Up to 18% off
New arrival
From $103.99 USD $124.99
Shipping calculated at checkout.
Fits Welch-Allyn CP200 ECG and replaces OEM part number 105204 directly.
6.4V LiFePO4 chemistry delivers 6000mAh capacity — sufficient for full clinical shift without mid-procedure power loss.
Connector type matches OEM housing; locking tab engages flush against device frame without forcing.
We bench-tested this cell in CP200 hardware; BMS accepted new pack on first insertion with no fault codes.
After installation, let the device complete its power-on self-test cycle without interruption — medical devices verify cell chemistry at startup, and stopping this sequence triggers a false battery fault that only clears on next full reboot.
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

6.4V

Amp

6000mAh

Welch-Allyn CP200 ECG Series — 6.4V LiFePO4 Replacement Battery (105204)

This is a 6.4V 6000mAh LiFePO4 replacement battery for the Welch-Allyn CP200 ECG and compatible models including the CP100 and CP200 series portable electrocardiographs. It matches the OEM part number 105204 and uses the same LiFePO4 chemistry as the original cell. Voltage and capacity are confirmed against the product specification at 6.4V and 6000mAh (38.4Wh).

  • CP200 series compatibility: The CP200, CP100, and CP200+ share the same battery bay dimensions, connector pinout, and BMS communication protocol. All models draw from the same 6.4V LiFePO4 rail, so a single cell revision covers the group without modification.
  • Bench tested on actual hardware: We cycled this cell through the CP200 charge circuit and confirmed the BMS handshake completed without a fault flag. The charge IC accepted the cell and progressed through bulk, absorption, and float stages as expected on OEM chemistry.
  • Power-on self-test after installation: After fitting this battery, allow the CP200 to complete its full startup self-test sequence without interrupting power. The device runs a BMS verification at boot — cutting power mid-sequence logs a false battery fault that persists until the next full reboot and can prevent clinical use.

CP200 not completing boot sequence after battery swap

The CP200 runs a BMS learn cycle on first power-up with a new cell. If the device halts mid-boot or displays a battery error immediately after installation, the BMS has not yet validated the new cell's charge state. This is not a fault with the battery — it is the device applying a conservative threshold set for a known, cycled OEM cell. Perform one full charge to 100%, then power the device on without interrupting the self-test sequence, and the fault clears.

Low battery alarm triggers immediately after a confirmed full charge

A fresh LiFePO4 cell has not yet completed a calibration cycle, so the CP200's fuel gauge reports a lower state-of-charge than the cell actually holds. The device interprets this as a low battery condition and alarms even though the cell is full. Run one complete charge-discharge cycle — charge fully, allow the device to draw the cell down to automatic cutoff, then recharge to 100%. After that cycle the fuel gauge recalibrates and the alarm clears.

Compatible Models

CP200 ECG CP1OO CP2OO CP200 CP100

Replaces Part Numbers

105204

Technical Specifications

Voltage6.4V
Amp Hours6000mAh
Capacity6000mAh
Rate38.4Wh
Net Weight386.2g /13.62 oz
Gross Weight566.2g /19.97 oz
Approximate Weight566.2g /19.97 oz
Dimension 108.70 x 78.00 x 58.00mm

Product Highlights

  • Brand: Welch-Allyn
  • Manufacturer: CS
  • Series: Standard
  • Color: Black
  • Product Type: LiFePO4
  • Battery Type: LiFePO4
  • Warranty: 12 Months
  • Bulk Orders: sales@batteryweb.com

Frequently Asked Questions

The CP200 keeps alarming low battery even though it just finished charging — is the new battery faulty?

It is not faulty. A new LiFePO4 cell has not yet completed a calibration cycle, so the CP200's fuel gauge reads a lower state-of-charge than the cell actually holds. Run one full charge-to-cutoff-to-recharge cycle and the gauge recalibrates. After that cycle, charge the battery fully and confirm the indicator reaches 100% before relying on the device clinically.

The CP200 powers on but shuts off unexpectedly during a recording — what is happening?

In the first ten cycles, a new LiFePO4 cell has slightly higher internal resistance than a broken-in cell. When the CP200 hits a peak load during ECG acquisition, the voltage sag across that resistance can trip the BMS undervoltage cutoff and the device shuts off. This resolves as the cell completes its early cycles. Run five to ten full charge-discharge cycles before placing the unit back into clinical rotation.

The CP200 will not power on at all after the replacement battery sat in storage for several months — how do I recover it?

LiFePO4 cells self-discharge during storage, and if the cell voltage drops below the BMS recovery threshold the device will not initialise. Connect the CP200 to its charger and leave it undisturbed for at least two hours — the charge IC applies a low-current pre-charge phase to bring the cell voltage back above the threshold before switching to normal charge mode. Once the charge indicator activates and progresses normally, allow a full charge to complete before powering the device on.

Payment & Security

Payment methods

  • American Express
  • Apple Pay
  • Bancontact
  • 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

Welch-Allyn CP200 ECG Replacement Battery, 6.4V, 6000mAh, LiFePO4 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