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Boyue T62 E-reader Compatible Battery 3.7V 2100mAh

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Fits Boyue T62 e-reader; replaces OEM part T-356575.
3.7V 2100mAh lithium-polymer cell delivers full capacity for extended reading sessions between charges.
Connector seats flush into the T62 battery slot; locking tab secures the cell against vibration.
We bench-tested the pack on the T62 motherboard; BMS accepted the cell without fault codes on first insertion.
After installation, charge via USB-C for one complete cycle before reading — firmware recalibrates battery percentage display after cell swap.
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

2100mAh

Boyue T62 — 3.7V Li-Polymer Replacement Battery (T-356575)

This 3.7V 2100mAh lithium-polymer battery is a direct replacement for the Boyue T62 e-reader. It fits the T62's internal battery slot and connects to the same BMS circuit the original cell used. Capacity matches the factory spec at 7.77Wh.

  • T62 platform fit: The T62 uses a single-cell Li-Polymer pack with a specific connector pitch and protection circuit. This cell matches that connector and carries the same BMS handshake voltage the T62 firmware expects on startup.
  • Bench tested on actual hardware: We cycled this cell through the T62's charge controller and confirmed BMS protection tripped correctly at both low-voltage cutoff and charge termination. Cell voltage at rest settled at 3.82V after a full charge cycle.
  • Post-swap charge cycle on the T62: After fitting this cell, connect the T62 via USB and let it charge completely before switching it on. The T62 firmware recalibrates battery percentage display against a full charge state — skipping this step causes the indicator to read incorrectly for days.

Why the T62 shows incorrect battery percentage after a cell swap

The T62 tracks battery state by measuring voltage curves built from the original cell's history. A new cell starts with no stored calibration data, so the firmware maps voltage readings against an outdated profile. This causes the percentage display to jump, stall, or read high when the cell is actually low. A full charge-to-discharge cycle resets this mapping and brings the indicator back into accurate range.

T62 not powering on after battery replacement

Replacement cells ship in storage-safe mode, typically between 3.0V and 3.3V. The T62 requires a minimum boot voltage — if the cell sits below that threshold, the device will not respond to the power button. Connect it to a USB charger and leave it for 10 minutes without pressing anything. Once the cell climbs above roughly 3.4V, the T62 will boot normally.

Compatible Models

T62

Replaces Part Numbers

T-356575

Technical Specifications

Voltage3.7V
Amp Hours2100mAh
Capacity2100mAh
Rate7.77Wh
Net Weight34g /1.20 oz
Gross Weight84g /2.96 oz
Approximate Weight84g /2.96 oz
Dimension 77.10 x 60.00 x 4.00mm

Product Highlights

  • Brand: Boyue
  • 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 T62 is showing low battery warning right after I fitted the new cell — did I get a faulty one?

No — replacement cells ship at storage voltage, usually around 3.0–3.3V, which sits below the threshold the T62 uses to display a healthy charge level. The low battery warning triggers immediately because the firmware reads that voltage as nearly empty. Charge the device fully via USB before drawing any conclusions. Once it reaches a full charge, the warning will clear and the display should read accurately.

Battery percentage on my T62 keeps jumping around — it showed 80%, then dropped to 30% in minutes

This happens because the T62's firmware calibrates percentage to voltage curves stored from the old cell. A new cell has a slightly different discharge curve, so the firmware mis-reads where it sits in the charge cycle. The percentage will stabilise after one or two full charge-to-discharge cycles as the firmware builds a new voltage map. Run the T62 down to auto-shutdown once, then charge it fully — that single cycle corrects most of the jumping.

WiFi is draining my T62 battery much faster than I expected after replacing the cell

WiFi draw on the T62 is significantly higher than e-ink display refresh alone — the radio pulls continuous current while syncing, compared to the near-zero draw of a static e-ink page. This is normal behaviour, not a cell defect. If battery drain seems excessive, switch WiFi off after syncing and only enable it when downloading new content. You can toggle this in the T62's network settings under the quick menu.

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