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Kobo Clara HD N249 Replacement Battery 3.7V 1200mAh

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From $39.99 USD $49.99
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Fits Kobo Clara HD N249 and Clara HD N239 e-readers; replaces OEM battery PR-284983N.
Voltage 3.7V, capacity 1200mAh — sufficient for extended reading sessions between charges on this 6-inch e-ink display.
Connector type mates directly to Clara HD internal slot; locking tab secures pack flush against device housing.
We ran full charge cycles on test units; BMS handshake completed normally, voltage regulation held steady throughout discharge curve.
After installation, charge via USB-C for one complete cycle — Clara HD firmware recalibrates battery percentage display after cell swap, so low battery warnings may appear during initial calibration.
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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

1200mAh

Kobo Clara HD N249 — 3.7V Li-Polymer Replacement Battery (PR-284983N)

This is a 3.7V 1200mAh Li-Polymer battery for the Kobo Clara HD, covering both the N249 and N239 variants. It replaces part number PR-284983N. The cell fits the 6-inch e-ink reader and restores power to units that no longer hold a charge or fail to boot.

  • N249 and N239 compatibility: Both Clara HD variants use the same battery footprint, connector, and BMS handshake. The PR-284983N cell seats identically in both — same 84.30 × 49.30 × 3.40mm envelope, same flex connector orientation.
  • Bench tested on actual hardware: We ran this cell in a Clara HD N249 and confirmed the BMS accepted the new cell without fault flags. The firmware battery indicator initialised on first boot and began calibrating across the charge cycle.
  • Post-swap charging cycle: After installing, connect via USB and let the Clara HD complete one full charge before extended use. The firmware recalibrates its battery percentage model against the new cell during that first cycle — skipping it causes the display to show inaccurate charge levels.

Kobo Clara HD not powering on after battery swap

Replacement Li-Polymer cells ship in storage-safe partial charge — typically around 3.0–3.2V. The Clara HD boot sequence requires a minimum voltage threshold to initialise the e-ink controller and firmware. If the cell voltage sits below that threshold, the unit will not respond to the power button at all. Connect the USB cable directly to a wall charger, wait 10 minutes, then attempt to power on.

Battery percentage jumping or reading 0% immediately after new cell

The Clara HD firmware tracks battery state using a learned model built against the original cell. After a swap, that model no longer matches the new cell's discharge curve, causing the percentage counter to jump erratically or report empty even on a charged battery. This is a calibration issue, not a faulty cell. Charge fully to 100%, then discharge to around 10% in a single session — the firmware recalibrates its curve during that cycle and the readout stabilises.

Compatible Models

Clara HD N249 Clara HD N239

Replaces Part Numbers

PR-284983N

Technical Specifications

Voltage3.7V
Amp Hours1200mAh
Capacity1200mAh
Rate4.44Wh
Net Weight28g /0.99 oz
Gross Weight78g /2.75 oz
Approximate Weight78g /2.75 oz
Dimension 84.30 x 49.30 x 3.40mm

Product Highlights

  • Brand: Kobo
  • Manufacturer: CS
  • Color: Black
  • Product Type: Li-Polymer
  • Battery Type: Li-Polymer
  • Warranty: 12 Months
  • Bulk Orders: sales@batteryweb.com

Frequently Asked Questions

My Kobo Clara HD powers on after the battery swap but the battery percentage drops from 80% to 15% within minutes — is the new cell faulty?

The cell is not faulty. The Clara HD firmware uses a charge model calibrated to the original battery, and that model is mismatched against the new cell immediately after a swap. The percentage counter will jump or collapse until the firmware rebuilds its curve. Run one full charge to 100%, followed by a discharge down to around 10% in a single session, and the display will stabilise.

WiFi sync is draining the new battery much faster than I expected — is the replacement cell undersized?

The cell capacity is correct at 1200mAh. WiFi draw on the Clara HD is significantly higher than e-ink display-only use — the radio pulls continuous current during a sync where a page turn does not. Turn off WiFi in settings between sync sessions and enable it only when downloading new titles. That single change has a much larger effect on battery life than cell capacity.

The Clara HD screen is updating slowly and page turns feel sluggish right after fitting the new battery — what causes that?

E-ink displays require a voltage spike to drive each pixel refresh. When the cell voltage is low — as it typically is straight out of packaging — the Clara HD's e-ink controller slows its refresh rate to stay within the available power budget. This is not a hardware fault. Charge the unit fully to 4.2V and the page turn response returns to normal speed.

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Kobo Clara HD N249 Replacement Battery, 3.7V, 1200mAh, Li-Polymer 1

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