HTC One S BJ40100 Replacement Battery 3.7V 1650mAh
This product ships directly from our Manufacturer’s Warehouse and is usually delivered within 5 – 8 business days to your doorstep.
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HTC One S BJ40100 Replacement Battery 3.7V 1650mAh - is backordered and will ship as soon as it is back in stock.
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Battery Care Tips
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
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
⚠️ 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.
HTC One S BJ40100 Replacement Battery 3.7V 1650mAh - is backordered and will ship as soon as it is back in stock.
Voltage
3.7V
Amp
1650mAh
HTC One S / Ville Series — 3.7V Li-Polymer Replacement Battery (BJ40100)
This is a 3.7V, 1650mAh lithium-polymer cell built to the same electrical specification as the original BJ40100 fitted to the HTC One S and Ville series. It fits the One S, Ville, Z560E, and Ville C. Swap it in when the original cell no longer holds a usable charge through a normal day.
- One S / Ville platform compatibility: The One S, Ville, Z560E, and Ville C all share the same chassis layout, connector pinout, and charge IC — meaning a single BJ40100-spec cell covers the full platform without any wiring or connector modification.
- Bench tested on actual hardware: We ran this cell through the One S charge IC and confirmed the BMS handshake completes correctly, charge termination triggers at the right voltage, and no false overcurrent trips occur during the first charge cycle.
- Fuel gauge recalibration on first cycle: On first use, run one complete discharge to shutdown followed by a full uninterrupted charge with fast charging disabled. The One S fuel gauge IC reads the new cell's discharge curve during this cycle — skipping it causes percentage jumps and premature low-battery warnings for the first several days.
Why the One S shuts down suddenly at 20–30% after a cell swap
The One S uses a coulomb counter that was calibrated to the degraded curve of the old cell. When a new cell with a steeper voltage cliff arrives, the system's state-of-charge estimate lags behind real capacity. Under modem or display load, the cell voltage drops faster than the fuel gauge predicts, and the protection circuit cuts power before the reported percentage reaches zero. One full discharge-charge cycle resets the coulomb counter's end-of-discharge reference point and brings percentage readings back into line.
Device won't power on after the replacement cell sat in storage
Lithium-polymer cells self-discharge in storage. If the BJ40100 shipped or sat unused below approximately 2.5V per cell, the BMS enters lockout to prevent damage and blocks normal startup. Connect the One S to a wall charger — not a PC USB port — and leave it for 15–20 minutes before attempting to power on. The charge IC on the One S delivers enough trickle current to pull the cell above the BMS re-enable threshold, which sits at roughly 2.9V.
Compatible Models
Replaces Part Numbers
Technical Specifications
Product Highlights
- Brand: HTC
- 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 HTC One S shows 25% battery and just cuts off without warning — is the new cell faulty?
The cell is almost certainly fine. The One S fuel gauge IC retains the discharge curve from the old degraded cell, so its state-of-charge estimate is wrong for the new cell's voltage behaviour. Under a sudden load spike — modem transmitting or screen at full brightness — voltage drops faster than the gauge expects and the protection circuit trips. Run one full discharge to automatic shutdown, then charge uninterrupted to 100%, and the coulomb counter resets its reference point against the new cell.
The battery percentage on my One S jumps around erratically after fitting this cell — 60% one minute, 45% the next.
This is the fuel gauge IC recalibrating. The One S stores a learned discharge model for the previous cell, and until it maps the new cell's voltage-to-capacity curve, readings will be unstable. The fix is one complete, uninterrupted discharge-charge cycle with the screen on during discharge to keep current draw consistent. After that single cycle, the coulomb counter locks onto the new curve and percentage readings stabilise.
The One S won't turn on at all after I installed the replacement battery — no boot, no charging screen.
The replacement cell may have dropped below the BMS lockout threshold during shipping or storage — typically below 2.5V. Plug the phone into a wall charger and leave it connected for at least 20 minutes before pressing the power button. A PC USB port often cannot deliver enough trickle current to recover a locked-out cell; a 5V wall adapter is the correct approach. Once voltage climbs above roughly 2.9V, the BMS re-enables and the phone will show the charging indicator.
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