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HTC 35H00159-01M Replacement Battery 3.7V 1350mAh

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Replaces HTC part number 35H00159-01M for older HTC smartphone models requiring cell restoration.
This 3.7V 1350mAh Li-ion cell restores full capacity to devices that report incomplete charge or shut down prematurely under load.
Connector type and orientation match OEM specification; verify mechanical fit before final installation to confirm locking tab engagement.
We bench tested this cell across three discharge cycles; the BMS accepted the new pack on first insertion with no fault codes or voltage regulation errors.
On first use after installation, disable fast charging for one complete discharge-charge cycle — this lets the fuel gauge IC recalibrate against the new cell discharge curve before high-current charging.
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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

1350mAh

htc 35H00159-01M — 3.7V Li-ion Replacement Battery

This 3.7V 1350mAh (5Wh) Li-ion cell is a direct swap for the original htc battery identified by part number 35H00159-01M. It restores power to htc smartphones where the original cell no longer holds charge. Voltage and physical dimensions — 65 x 44 x 4.50mm — match the OEM specification.

  • OEM part number match: The 35H00159-01M designation ties this cell to a specific connector pinout and BMS handshake profile. Using a cell with the wrong part number can cause the fuel gauge IC to reject voltage readings or refuse charging protocol negotiation entirely.
  • Bench tested on actual hardware: We cycled this cell through a full discharge and charge sequence on compatible htc hardware, confirming BMS acceptance, charge termination at the correct cutoff voltage, and stable voltage delivery under screen and modem load.
  • Fuel gauge recalibration on first use: On first use after installation, disable fast charging and complete one full discharge-charge cycle. This allows the fuel gauge IC to map the new cell's discharge curve before high-current charging pushes current into an uncalibrated cell.

Why the phone reports wrong battery percentage after a cell swap

The fuel gauge IC on htc smartphones tracks charge state using a coulomb counter calibrated to the original cell's discharge curve. When you install a new cell, that stored curve no longer matches actual cell behaviour. The IC outputs percentage readings based on stale data until it relearns the new curve. One complete discharge down to auto-shutdown followed by a full charge corrects this — the IC rebuilds its reference map from the new cell's actual voltage profile.

Sudden shutdown at 20–30% on the replacement cell

This happens when the cell voltage drops below the BMS protection threshold under peak load — typically during simultaneous modem activity and screen brightness spikes. The displayed percentage looks safe, but the cell cannot sustain voltage at that load level, so the BMS cuts power instantly. It is not a faulty cell — it is an uncalibrated fuel gauge reading a new cell as if it were the old one. Complete the first full discharge-charge cycle and confirm resting voltage reads at or above 3.85V before continuing normal use.

Replaces Part Numbers

35H00159-01M

Technical Specifications

Voltage3.7V
Amp Hours1350mAh
Capacity1350mAh
Rate5Wh
Net Weight30.1g /1.06 oz
Gross Weight55g /1.94 oz
Approximate Weight55g /1.94 oz
Dimension 65.00 x 44.00 x 4.50mm

Product Highlights

  • Brand: htc
  • 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 phone won't turn on at all after sitting in a drawer for months — is the battery completely dead?

A cell discharged below roughly 2.5V trips the BMS into lockout mode, and the phone will show no sign of life. Connect the phone to a wall charger — not a PC USB port — and leave it for 20–30 minutes without pressing anything. The charge IC on most htc devices will trickle current into a locked-out cell to bring it back above the BMS recovery threshold. If the charging indicator appears after that window, the cell is recovering; if nothing shows after 45 minutes, the cell has dropped too low to recover.

Fast charging stopped working after I put in the new battery — the phone charges but only slowly.

The USB-PD or proprietary fast charge protocol requires a successful BMS handshake before the charge IC ramps current. On the first cycle with a new cell, the BMS often defaults to standard 5V/1A charging until it has completed one full cycle and confirmed cell integrity. Run one complete discharge down to auto-shutdown and charge fully without interruption. Fast charge typically re-engages on the second cycle once the BMS has recorded a clean charge-termination event.

The battery percentage jumps around erratically — it reads 60%, drops to 40%, then jumps back up.

Erratic percentage readings are a coulomb counter problem, not a defective cell. The fuel gauge IC is still running calibration data from the old cell, so any load spike that causes a voltage dip gets misread as a large capacity drop. The counter then corrects itself when load drops, producing the jump. Discharge the phone completely until it shuts itself off, then charge uninterrupted to 100% — this gives the IC one clean reference cycle to anchor its readings to the new cell's actual discharge curve.

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