Welcome to our store. Your trusted source for batteries and power solutions. Learn more

For support or quotes: sales@batteryweb.com
WELCOME5
BatteryWeb

Pocketbook 631 Touch HD Replacement Battery 3.7V 1500mAh

Up to 21% off
New arrival
From $24.99 USD $30.99
Shipping calculated at checkout.
Fits Pocketbook 631 Touch HD e-reader; replaces OEM battery PR-285083 directly.
3.7V, 1500mAh Li-Polymer cell delivers the capacity this e-ink display requires for multi-week standby between charges.
Connector seats flush into the battery slot; no locking tab — insertion is friction-fit only, orientation marked on housing.
Bench testing confirmed BMS accepts charge current without fault cutoff; voltage ramped cleanly through firmware calibration on first cycle.
After installing, charge via USB for one full cycle before reading — Pocketbook firmware recalibrates battery percentage display only after detecting a complete charge curve from the new cell.
Visa Mastercard American Express PayPal Apple Pay Google Pay Shop Pay Discover Klarna Afterpay Stripe
✦

Check that your old battery model number and device model to match our description. This makes sure they work together.

✦

We ship your order same day if you buy it before 4 PM EST.

Warranty

Let customers speak for us

from 11 reviews

Product is exactly as described and arrived quickly

Robert Jones
Rocket ES4-12 Compatible Replacement Battery

It took a bit longer than expected, likely due to the holiday season, but that was understandable. So far, the battery seems to be working well!

Linda M.
MGE UPS Systems Pulsar EX 1500RT Compatible Replacement Battery By Bright Way

Excellent substitute for the original, appearing to be the perfect replacement.

Alberto J.
APC SMART-UPS RT SURTA3000RMXL3U UPS High Performance Replacement Battery Set

It was what i was looking for. Support is fast

Jaswal
WAHEGURUG - RADHASWAMI

Fast service

Mark Casias
BatteryWeb

Perfect fit

Mark Casias
STX20L-BS Battery for Harley Softail FLS FLST 1991-2017 High Performance

Works Perfectly!!

Ben Benson
Invacare 220 Scooter High Performance Medical Replacement Battery Set

Send Your Battery Photo

Expert Technician Help

Snap a photo or video of your battery and send it to us. We'll identify the exact replacement—fast and hassle-free. Our team has helped thousands of customers find the right battery quickly and easily.

POST YOUR BATTERY IMAGE
Product & Solutions Expert

Product & Solutions Expert

✉ sales@batteryweb.com

🔹 10+ Years Battery Experience 🔹 Fast & Accurate Identification

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

Pocketbook 631 Touch HD — 3.7V Li-Polymer Replacement Battery (PR-285083)

This 3.7V, 1500mAh Li-Polymer cell replaces the OEM battery in the Pocketbook 631 Touch HD e-reader. It matches the original PR-285083 specification and fits the 84.15 x 49.50 x 2.70mm cell bay without modification. Use it to restore capacity in a device that no longer holds charge or fails to power on.

  • 631 Touch HD fit: The 631 Touch HD uses a single-cell Li-Polymer pack with a dedicated BMS connector that handshakes with the firmware for percentage reporting. This cell matches the connector pinout and voltage rail, so the firmware reads state-of-charge correctly after a full calibration cycle.
  • Bench tested on actual hardware: We ran this cell through charge and discharge cycles on a 631 Touch HD unit. The BMS accepted the cell without error flags, and the e-ink controller drew stable current through page refresh cycles without triggering undervoltage cutoff.
  • Post-swap charge cycle on the 631 Touch HD: After installing, connect the device via its USB port and charge to 100% before first use. The 631 Touch HD firmware recalibrates its fuel gauge to a new cell only during a complete charge cycle — skipping this step causes the percentage display to read inaccurately for days.

Why the 631 Touch HD shows incorrect battery percentage after a cell swap

The 631 Touch HD stores charge curve data in firmware memory tied to the previous cell's behaviour. When a new cell is installed, that stored data no longer matches the actual cell chemistry, so percentage readings jump or read falsely high. The fuel gauge relearns the curve only after a full charge from a low state. Run the device down to the low-battery warning, then charge uninterrupted to 100% to complete the recalibration.

Page turn response slow immediately after battery replacement

E-ink displays require a brief voltage spike to push charged particles across the microcapsule layer on each refresh. When cell voltage sits below roughly 3.5V — common in a storage-discharged replacement cell — the e-ink controller slows its refresh timing to stay within safe draw limits. This makes every page turn feel sluggish even though the device is otherwise functional. Charge the replacement cell to full before use and the response returns to normal speed.

Compatible Models

631 Touch HD

Replaces Part Numbers

PR-285083

Technical Specifications

Voltage3.7V
Amp Hours1500mAh
Capacity1500mAh
Rate5.55Wh
Net Weight25g /0.88 oz
Gross Weight75g /2.65 oz
Approximate Weight75g /2.65 oz
Dimension 84.15 x 49.50 x 2.70mm

Product Highlights

  • Brand: Pocketbook
  • 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 Pocketbook 631 Touch HD won't turn on at all after I put in the new battery — did I get a dead cell?

Almost certainly not. Replacement cells ship in storage charge, typically around 3.0–3.2V, which is below the 631 Touch HD's minimum boot voltage. The device won't attempt to power on at that level. Connect it to a USB charger and leave it for at least 10 minutes before pressing the power button — once the cell climbs above roughly 3.4V, the device will boot normally.

The battery percentage on my 631 Touch HD jumps around — it reads 80% then drops to 15% within an hour of light reading. Is the new cell faulty?

The cell is fine — the firmware's fuel gauge is still mapped to the old cell's charge curve. We see this on the bench after every cell swap on this model. The gauge recalibrates by running a full discharge-to-low-warning cycle followed by an uninterrupted charge to 100%. After one complete cycle, the percentage readings stabilise.

WiFi sync is draining my 631 Touch HD much faster than it did before I replaced the battery — did I get a lower-capacity cell?

The capacity is correct at 1500mAh matching the OEM spec, but WiFi draw on the 631 Touch HD runs significantly higher than e-ink display refresh alone — active sync can pull several times the current of a standard page turn. A freshly installed cell with an uncalibrated fuel gauge amplifies the perceived drop. Complete one full charge cycle first, then limit sync sessions to short bursts rather than keeping WiFi on continuously.

Payment & Security

Payment methods

  • American Express
  • Apple Pay
  • Diners Club
  • Discover
  • Google Pay
  • Mastercard
  • PayPal
  • Shop Pay
  • Visa

Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.

Related Products

Pocketbook 631 Touch HD Replacement Battery, 3.7V, 1500mAh, Li-Polymer 1

Engineered for Performance. Built to Last.

Check out our top-rated selection of reliable products built to last. We offer high-quality options that deliver consistent performance for all your needs.

Our Collections