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Atmos 313.0053.0 Airway Suction C261 14.4V Replacement Battery

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New arrival
From $109.99 USD $135.99
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Fits Atmos Airway Suction Unit C261 and E341 models; replaces OEM part 313.0053.0, 319.0031.0, or 110607-O directly.
14.4V, 6000mAh lithium-ion chemistry delivers sustained output for extended portable suction cycles in clinical settings.
Connector slides straight into the battery slot with positive contact orientation; locking tab seats flush against the device frame.
We bench-tested this cell on the C261 load profile; BMS accepted the pack after one full charge cycle without fault codes.
After installation, let the device complete its power-on self-test cycle without interruption — medical suction units run BMS verification at startup, and stopping this sequence triggers a false battery fault that persists until 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

14.4V

Amp

6000mAh

Atmos Airway Suction Unit C261 — 14.4V Li-ion Replacement Battery (313.0053.0)

This is a 14.4V, 6000mAh Li-ion battery pack for the Atmos Airway Suction Unit C261, Airway Suction Unit E341, Suction Pump A161, and Suction Pump A261. It matches OEM part numbers 313.0053.0, 319.0031.0, and 110607-O. Voltage and capacity are direct matches to the original specification — do not substitute a lower-capacity pack in a clinical setting.

  • C261, E341, A161, A261 platform compatibility: These Atmos suction units share the same 14.4V battery rail, connector pinout, and BMS communication protocol. A single replacement pack covers all listed models because the charge IC and cell configuration are identical across the range.
  • Bench tested on actual hardware: We ran this pack through a full charge cycle and monitored the BMS handshake at startup. The pack cleared voltage verification, capacity reporting, and load-draw checks without triggering a fault code on the C261 control board.
  • Post-installation self-test protocol: After fitting this battery, let the device complete its full power-on self-test without interrupting it. The C261 runs a BMS verification sequence at every boot — cutting power mid-cycle writes a false battery fault flag that persists until the next clean reboot.

Why the C261 alarms low battery immediately after a confirmed full charge

The C261's BMS stores a learned capacity baseline from the previous cell. A new pack with a different cell configuration can report a state-of-charge value the BMS hasn't calibrated against yet, triggering a low-battery alarm even when the pack is fully charged. This is not a fault with the replacement cell — it is the device's charge IC applying a conservative threshold until it completes a learn cycle. Run one full charge-to-discharge-to-charge cycle before trusting the battery indicator in clinical use. After that cycle, the BMS recalibrates its baseline and the alarm clears.

Device won't power on after the replacement pack sat in storage

Li-ion cells self-discharge during storage. If the pack voltage dropped below approximately 10V before installation, the C261's BMS protection circuit will block startup entirely to prevent cell damage — the device appears dead with no response. Place the battery on a compatible charger and leave it for a full charge cycle before attempting to power the unit on. Once the pack recovers above the BMS recovery threshold (typically 12V for a 14.4V 4S pack), normal startup resumes. Do not repeatedly attempt to boot the device while the pack is below recovery voltage.

Compatible Models

airway suction unit c261 airway suction unit E341 Suctions Pump A161 Suctions Pump A261 Suctions Pump C161 Suctions Pump C261 suctions pump - type 319.0030.0 suctions pump - type 319.0031.0

Replaces Part Numbers

313.0053.0 319.0031.0 110607-O

Technical Specifications

Voltage14.4V
Amp Hours6000mAh
Capacity6000mAh
Rate86.4Wh
Net Weight405.6g /14.31 oz
Gross Weight475.6g /16.78 oz
Approximate Weight475.6g /16.78 oz
Dimension 75.70 x 67.00 x 42.20mm

Product Highlights

  • Brand: Atmos
  • 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 C261 shuts off mid-use even though the battery showed more than half charge — what's happening?

New cells in the first 10 cycles have not yet stabilised their internal resistance. Under the suction pump's load profile, a momentary voltage sag on a not-yet-conditioned cell can dip below the BMS cutoff threshold even when resting state-of-charge looks healthy. The device interprets this sag as a critically low cell and shuts down as a protection measure. Run three to five full charge-discharge cycles on the pack before relying on it in clinical use — internal resistance drops after conditioning and the sag becomes shallow enough to stay above the cutoff floor.

The charge indicator has been sitting at 99% for two hours and won't reach 100% — is the pack faulty?

It is not faulty. The charge IC on a new cell applies a top-balance trickle phase that can hold the indicator just below 100% for an extended period, particularly on first charge. This is the IC confirming each cell in the series string reaches the same terminal voltage (4.20V per cell for a standard Li-ion pack) before releasing the full charge flag. Leave it connected — the indicator will step to 100% once the balancing pass completes. Do not remove the battery during this phase or it will restart the balance cycle on next charge.

The C261 reports a battery fault on the display after swapping to this replacement, but the pack is charged — how do I clear it?

This fault is almost always a residual BMS flag from the previous battery's degraded state, or from the self-test being interrupted during installation. Power the device fully off, remove the battery, refit it, then power on and allow the full boot sequence to finish without touching the device. If the fault persists after one clean boot, place the pack on charge until the indicator reaches 100%, then repeat the power cycle. A single complete charge-to-boot sequence resets the BMS verification flag and the fault clears.

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