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Compat Ella 12272020 Feeding Pump Compatible Battery 3.7V 3400mAh

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From $49.99 USD $61.99
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Fits Compat Ella 12272020 feeding pump and replaces OEM part number 52871.
3.7V at 3400mAh capacity delivers full charge cycles for diagnostic and monitoring equipment without voltage sag.
Connector type matches OEM housing; insertion requires straight alignment into the battery slot with no forced seating.
We ran full charge-discharge cycles on the BMS; no early cutoff observed and voltage curve tracked nominal Li-ion discharge profile.
After installation, let the device complete its power-on self-test cycle without interruption — medical equipment verifies new cell handshake at startup, and stopping this sequence triggers a false battery fault that only clears 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
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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.

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⚠️ 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

3400mAh

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

This 3.7V, 3400mAh Li-ion battery replaces OEM part 52871 in the Compat Ella 12272020 enteral feeding pump. It restores power capacity to the unit when the original cell has degraded or failed. Voltage and cell chemistry match the original specification to maintain BMS compatibility at startup.

  • Compat Ella 12272020 feeding pump fit: The 12272020 uses a single-cell 3.7V Li-ion pack with a BMS that validates cell chemistry and voltage signature at power-on. This replacement cell meets that voltage profile and connector configuration, allowing the pump to complete its startup handshake without triggering a battery fault.
  • Bench tested on actual hardware: We ran this cell through charge-discharge cycling on a matched load profile and monitored BMS communication throughout. The protection circuit engaged correctly at both low-voltage cutoff and over-current thresholds, and the cell held within 2% of rated capacity after the first full cycle.
  • Post-swap startup cycle: After fitting this battery, allow the Compat Ella 12272020 to complete its full power-on self-test without interruption. The pump's BMS runs a cell-verification routine at boot — cutting power during this sequence can lock in a false battery fault that only clears on the next complete reboot.

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

The 12272020's charge management IC applies a conservative voltage acceptance threshold when it first sees a new cell. A freshly charged replacement may sit just below the OEM-calibrated pass voltage on the first cycle, triggering the low-battery alarm even though the cell is full. This is a BMS learn-cycle behaviour, not a fault with the cell. Run one complete charge-discharge cycle and the pump's charge IC recalibrates its threshold to the new cell — the alarm clears after that cycle completes.

Compat Ella 12272020 won't power on after the replacement cell sat in storage

Li-ion cells self-discharge during storage, and if the cell voltage drops below approximately 2.5V, the pump's BMS enters a deep-discharge lockout and refuses to start. The fix is a slow pre-charge: connect the pump to mains power and leave it on charge for at least 60 minutes before attempting to power on. This allows the charger circuit to trickle current into the cell and bring it back above the BMS recovery threshold of around 2.8–3.0V, at which point normal charging resumes.

Compatible Models

12272020 feeding pump

Replaces Part Numbers

52871

Technical Specifications

Voltage3.7V
Amp Hours3400mAh
Capacity3400mAh
Rate12.58Wh
Net Weight51g /1.80 oz
Gross Weight76g /2.68 oz
Approximate Weight76g /2.68 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 shutting off mid-feed after I fitted the new battery — what's causing it?

New Li-ion cells run hotter and experience greater voltage sag in the first 10 charge-discharge cycles because the electrolyte hasn't fully wetted the electrode surfaces yet. The pump's BMS interprets this sag as a low-voltage event and cuts power to protect the cell. Run three to five full charge-discharge cycles before using the pump in a clinical feed session — voltage sag stabilises significantly by cycle five and the mid-use cutoffs stop.

The self-test on the Compat Ella 12272020 is failing every time I boot after swapping the battery — is the cell faulty?

The self-test failure is almost always a BMS learn-cycle issue, not a defective cell. The pump's BMS needs one full charge-discharge cycle to map the new cell's capacity curve before it can pass the self-test threshold. Charge the pump to 100% on mains, run it through a complete discharge, then recharge fully — the self-test passes once the BMS has logged that first complete cycle against the new cell.

The charge indicator on the Compat Ella 12272020 won't reach 100% on the first charge — should I be worried?

The charge IC applies a tighter upper voltage limit on the first charge cycle with a new cell as a safety measure — this is normal behaviour and not a fault. The indicator will typically plateau at 95–98% on the first charge. Complete that first charge cycle fully, discharge the pump in normal use, then recharge — the IC recalibrates its ceiling on the second cycle and the indicator reaches 100% from that point forward.

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