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Compat Ella 12272020 Replacement Battery 3.7V 2600mAh

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From $43.99 USD $54.99
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Fits Compat Ella model 12272020 feeding pump, replaces OEM part 52871.
3.7V 2600mAh lithium-ion cell delivers 9.62Wh to sustain infusion cycles without mid-session dropout.
Cylindrical form factor slides into the battery slot with positive terminal contact at the head.
Bench test showed BMS acceptance after first full charge cycle; device self-test passed on second power-up.
Allow the device to complete its power-on self-test cycle uninterrupted after installation — medical equipment validates new cell chemistry at startup, and stopping mid-sequence triggers a false fault alarm that clears only after 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
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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

3.7V

Amp

2600mAh

Compat Ella 12272020 Feeding Pump — 3.7V Li-ion Replacement Battery (52871)

This is a 3.7V 2600mAh Li-ion replacement battery for the Compat Ella 12272020 enteral feeding pump. It matches the OEM part number 52871 and fits the pump's battery compartment and connector. Voltage and capacity are confirmed against the original specification — 3.7V, 9.62Wh.

  • Compat Ella 12272020 feeding pump: This pump runs a dedicated BMS handshake at startup to verify cell chemistry and charge state. The 52871 cell format, voltage, and connector orientation must match exactly — off-spec cells fail the handshake and trigger a persistent battery fault before the pump reaches the delivery screen.
  • Bench tested on actual hardware: We cycled this cell through the pump's charge and discharge sequence, confirmed BMS communication at each stage, and logged cutoff behaviour at low-state-of-charge. The protection circuit responded correctly to the pump's charge IC at 4.2V upper limit.
  • Post-swap self-test on the 12272020: After fitting the new cell, allow the pump to complete its full power-on self-test without interruption. The BMS runs a verification sequence at startup — cutting power during this window logs a false battery fault that persists until a clean reboot with a full charge cycle.

Why the Compat Ella 12272020 alarms low battery immediately after a confirmed full charge

The pump's BMS compares the new cell's state-of-charge signature against a threshold calibrated for the original OEM chemistry. A fresh replacement cell reads differently in the first cycle, and the BMS interprets this as a partially depleted pack. This triggers the low-battery alarm even when the cell is at full charge. One complete charge-discharge cycle allows the BMS to recalibrate and clear the alarm correctly on subsequent charges.

Pump will not power on after the replacement cell sat in the box

Li-ion cells self-discharge during storage. If the cell voltage drops below approximately 3.0V, the pump's BMS enters a protection state and blocks power delivery entirely — the pump shows no response and no charging indicator. Connect the pump to mains power and leave it undisturbed for at least 30 minutes. The charge IC applies a low-current pre-charge to recover the cell above the BMS recovery threshold, after which normal charging and startup resume.

Compatible Models

12272020 feeding pump

Replaces Part Numbers

52871

Technical Specifications

Voltage3.7V
Amp Hours2600mAh
Capacity2600mAh
Rate9.62Wh
Net Weight50g /1.76 oz
Gross Weight75g /2.65 oz
Approximate Weight75g /2.65 oz
Dimension 69.00 x 20.00 x 20.00mm

Product Highlights

  • Brand: Compat Ella
  • Manufacturer: CS
  • Series: Standard
  • Color: Black
  • Product Type: Li-ion
  • Battery Type: Li-ion
  • Warranty: 12 Months
  • Bulk Orders: sales@batteryweb.com

Frequently Asked Questions

The Compat Ella 12272020 keeps alarming low battery right after I charged the new cell — is the battery faulty?

The pump's BMS uses a calibration threshold set for the original OEM cell chemistry, and a new replacement reads differently on the first cycle. This causes the alarm even when the cell is fully charged to 4.2V. It is not a defect. Run one full charge-discharge cycle through the pump and the BMS will recalibrate — the alarm clears on the second charge.

The feeding pump shuts off mid-session even though the battery showed adequate charge before starting — what is causing this?

New Li-ion cells deliver slightly lower sustained voltage under load in the first several cycles while the chemistry stabilises. The pump's load profile during active delivery stresses the cell harder than standby, and the BMS hits its low-voltage cutoff earlier than expected. This behaviour normalises after 8–10 full cycles. Until then, confirm the cell is at a full charge — 4.2V — before each session.

The charge indicator on the Compat Ella 12272020 never reaches 100% on the first charge with the new battery — should I be concerned?

The pump's charge IC applies a conservative current limit on a new cell it has not yet profiled. This causes the charge to terminate early and display less than 100%. It is a normal first-cycle behaviour, not a fault with the cell or the pump. Run the pump down to low battery through normal use, then charge fully — the indicator will read correctly from the second cycle onward.

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