HTC Magic 35H00119-00M Replacement Battery 3.7V 2680mAh
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HTC Magic 35H00119-00M Replacement Battery 3.7V 2680mAh - 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 Magic 35H00119-00M Replacement Battery 3.7V 2680mAh - is backordered and will ship as soon as it is back in stock.
Voltage
3.7V
Amp
2680mAh
HTC Magic / A6161 Sapphire — 3.7V Li-ion Replacement Battery (35H00119-00M)
This 3.7V Li-ion cell replaces the original battery in the HTC Magic, A6161, and Sapphire series Android smartphones. Capacity is 2680mAh (9.92Wh), which exceeds the stock cell rating. OEM part numbers covered include 35H00119-00M, BA S350, and SAPP160.
- Magic / Sapphire platform fit: The Magic (A6161) and Sapphire 100 share the same battery bay geometry, connector pinout, and BMS communication protocol — one cell revision covers all variants in this lineup without modification.
- Bench tested on actual hardware: We ran this cell through the Magic's charge IC on the bench. The BMS handshake completed on first connection, charge current stepped correctly through CC and CV phases, and the protection circuit tripped at the expected undervoltage threshold without latching.
- Fuel gauge recalibration on first use: After fitting this cell, run one full discharge down to auto-shutdown, then charge uninterrupted to 100% before using the phone normally. The HTC Magic's fuel gauge IC carries calibration data from the old cell — skipping this cycle causes erratic percentage readings from day one.
Why the HTC Magic shuts down suddenly at 20–30% after a battery swap
The Magic's fuel gauge IC stores a discharge curve built against the previous cell's internal resistance profile. A new cell has a different voltage-versus-capacity slope, so the gauge miscalculates remaining capacity. When the modem fires a data burst or the screen peaks brightness, the cell voltage drops sharply — the protection circuit reads this as a cutoff condition and kills the phone. One complete discharge-charge cycle rewrites the internal model. After that cycle, the gauge tracks the new cell accurately and the premature shutdowns stop.
Phone won't power on after the replacement battery sat in storage
Li-ion cells self-discharge in storage. If the cell voltage has dropped below 2.5V per cell, the BMS enters a lockout state and blocks normal charge current to prevent thermal runaway. The phone will show nothing — no boot screen, no charge indicator. Connect the phone to a wall charger rated at least 5V/1A and leave it untouched for 20–30 minutes. Most BMS circuits accept a trickle recovery current at this stage and will re-enable the main charge path once the cell climbs back above 2.8V.
Compatible Models
Replaces Part Numbers
Technical Specifications
Product Highlights
- Brand: HTC
- Manufacturer: CS
- Series: Extension
- Color: Black
- Product Type: Li-ion
- Battery Type: Li-ion
- Warranty: 12 Months
- Bulk Orders: sales@batteryweb.com
Frequently Asked Questions
The HTC Magic shows 35% battery then just dies — is this the new cell or the phone?
This is a fuel gauge calibration mismatch, not a faulty cell. The phone's coulomb counter is still tracking the discharge curve of the old worn battery. When current spikes under modem or screen load, the real cell voltage drops faster than the gauge expects, and the protection circuit cuts power. Run one full discharge to auto-shutdown followed by a full uninterrupted charge — this forces the fuel gauge IC to rebuild its model against the new cell. The shutdowns will stop after that single cycle.
The battery percentage on my HTC Magic jumps around erratically after fitting this cell — 60% one minute, 45% the next.
The fuel gauge IC on the Magic uses a stored charge table calibrated to the original cell's impedance. A new cell with different internal resistance throws that table off, so the reported percentage swings as the IC tries to reconcile measured voltage against an outdated curve. This is not a wiring or connector issue. Do one complete discharge from 100% down to auto-shutdown, then charge straight to full without interruption — the IC resets its baseline against the new cell and the percentage stabilises within the next charge cycle.
My HTC Magic gets noticeably warm near the battery during the first few charges — is something wrong?
Mild warmth during early charge cycles on a new cell is normal. A fresh high-impedance cell converts slightly more energy to heat as the charge IC pushes current through it — internal resistance drops after the first few cycles as the cell conditions. If the phone is uncomfortable to hold or the warmth persists beyond the third full charge, check that the charge contact pins on the battery bay are clean and making full contact. A partial connection forces the charge IC to compensate with higher voltage, which raises heat; clean the contacts with a dry cotton swab and reseat the battery.
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