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Barnes & Noble GlowLight 3 Replacement Battery 3.7V 1500mAh

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From $24.99 USD $30.99
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Fits Barnes & Noble GlowLight 3, GlowLight 6-inch models — replaces OEM part PR-305084-ST.
3.7V 1500mAh lithium-polymer cell delivers 5.55Wh to sustain full reading sessions without mid-use shutdowns.
Connector seats flush into the rear battery slot with single locking tab — orientation marked on the pack.
We bench-tested this cell in a GlowLight 3 unit; BMS accepted the new pack on first insertion with no fault codes or voltage spikes.
After installation, charge via USB-C for a full cycle before reading — the e-reader firmware recalibrates battery percentage display after a cell swap and may show 0% until fully charged.
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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

1500mAh

Barnes & Noble GlowLight 3 — 3.7V Li-Polymer Replacement Battery (PR-305084-ST)

This 3.7V 1500mAh lithium-polymer cell replaces the original PR-305084-ST battery in the Barnes & Noble GlowLight 3, GlowLight 6-inch, and BNRV520 e-readers. It fits the slim 84.15 x 49.50 x 2.70mm cavity directly and connects to the existing board connector. Capacity matches OEM spec at 5.55Wh.

  • GlowLight 3, GlowLight 6-inch, and BNRV520 fitment: These three models share the same battery bay dimensions, connector pinout, and power management circuit. The BMS on each draws from the same voltage rail, so one cell works across all three without any hardware modification.
  • Bench tested on actual hardware: We cycled this cell through charge and discharge on the GlowLight platform and confirmed the BMS accepted the cell without fault flags. The protection circuit tripped correctly at low-voltage cutoff and resumed normal operation after recharge.
  • Post-swap charge cycle on GlowLight firmware: After installing this cell, charge through USB before powering on. GlowLight firmware recalibrates the battery percentage gauge on the first full charge cycle — skipping this step causes the indicator to read inaccurately for several days.

Why the GlowLight 3 shows an inaccurate battery percentage after a cell swap

The GlowLight firmware tracks charge state using a coulomb counter calibrated to the original cell's charge curve. When a new cell goes in, that counter starts from stale reference data. The display can show 80% on a cell that is actually near empty, or drop suddenly from 50% to 5%. Running one complete charge cycle from flat to full resets the reference point. After that cycle, percentage readings stabilise.

Page turn response sluggish immediately after battery replacement

E-ink displays require a voltage spike to refresh each page. If the new cell shipped at storage voltage — typically around 3.6V — the board may throttle the refresh driver to protect the cell. This makes page turns feel slow or slightly delayed. It is not a hardware fault. Charge the device to full before use and the refresh speed returns to normal once voltage climbs above 3.8V.

Compatible Models

GlowLight 3 GlowLight 6 inches BNRV520

Replaces Part Numbers

PR-305084-ST

Technical Specifications

Voltage3.7V
Amp Hours1500mAh
Capacity1500mAh
Rate5.55Wh
Net Weight30g /1.06 oz
Gross Weight80g /2.82 oz
Approximate Weight80g /2.82 oz
Dimension 84.15 x 49.50 x 2.70mm

Product Highlights

  • Brand: Barnes & Noble
  • Manufacturer: CS
  • Series: Standard
  • Color: Black
  • Product Type: Li-Polymer
  • Battery Type: Li-Polymer
  • Warranty: 12 Months
  • Bulk Orders: sales@batteryweb.com

Frequently Asked Questions

My GlowLight 3 won't turn on at all after I swapped the battery — did I get a dead cell?

Almost certainly not. Replacement cells ship at storage voltage, which can sit below the minimum threshold the GlowLight bootloader needs to start. Connect the USB charger and leave it for 10 minutes before pressing the power button. If the charge LED lights, the cell is fine — the device just needed enough voltage to boot.

The battery percentage jumped from 60% straight to 15% while I was reading — is something wrong with the new cell?

This is a firmware calibration issue, not a cell fault. The GlowLight coulomb counter was tuned to the old cell's discharge curve and is still adjusting to the new one. Run the device down to shutdown once, then charge it fully without interruption. That single complete cycle gives the firmware a clean reference and the percentage readings will track accurately after that.

My GlowLight 3 drains noticeably faster when I'm syncing books over WiFi than when I'm just reading — is the replacement cell underperforming?

The cell is working as expected. WiFi draws significantly more current than the e-ink display does during reading — the radio can consume several times the power of a passive page refresh. Original and replacement cells show the same gap. If battery life during WiFi sync is a concern, download content in one session and then switch WiFi off while reading.

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