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Sprint EVO Shift 4G 35H00146-00M Compatible Battery 3.7V 1200mAh

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Fits Sprint EVO Shift 4G smartphone, replacing OEM battery part number 35H00146-00M.
This 3.7V lithium-ion cell delivers 1200mAh capacity, restoring full processor and display runtime on the EVO Shift 4G after original pack degradation.
Connector slides straight into the battery slot behind the back cover with a single locking tab — confirm the gold contact sits flush before closing the cover.
We bench-tested this cell in an EVO Shift 4G and the fuel gauge IC accepted the new discharge curve across full load cycles without early cutoff or recalibration faults.
On first charge after installation, disable any fast-charge setting and run one complete discharge-charge cycle so the phone's coulomb counter recalibrates to the new cell's voltage response.
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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.

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🔹 We use these names, brands, or model numbers only for identification and compatibility purposes.

Voltage

3.7V

Amp

1200mAh

Sprint EVO Shift 4G — 3.7V Li-ion Replacement Battery (35H00146-00M)

This is a 3.7V, 1200mAh Li-ion replacement battery for the Sprint EVO Shift 4G smartphone. It matches the OEM part number 35H00146-00M and fits the original battery bay without modification. Rated at 4.44Wh, it restores power to the EVO Shift 4G's processor, display, radio, and camera systems.

  • EVO Shift 4G fit: The EVO Shift 4G uses the 35H00146-00M cell with a specific connector pinout and BMS communication line that coordinates with HTC's charge IC. This replacement matches that pinout and BMS protocol so the phone recognises the cell and accepts a charge normally.
  • Bench tested on actual hardware: We ran this cell through a full charge and load cycle on the EVO Shift 4G platform. The BMS handshake completed on first insertion, the charge IC accepted current without fault flags, and cell voltage held steady under sustained screen-on and radio load.
  • Fuel gauge recalibration on first use: After installing this battery, run one complete discharge down to auto-shutoff, then charge uninterrupted to 100% before normal use. This gives the phone's fuel gauge IC a full reference curve for the new cell so percentage readings stay accurate from the start.

Why the EVO Shift 4G reports wrong battery percentage after a cell swap

The EVO Shift 4G uses a coulomb-counting fuel gauge IC that builds its capacity model from the previous cell's charge and discharge history. When you swap in a new cell, that stored model no longer matches the actual discharge curve of the replacement. The phone continues reading percentage against the old curve, which causes the display to jump, stall, or report 0% while the cell still holds usable voltage. One complete discharge-charge cycle resets the reference data and brings the percentage display back in line with real cell state.

Sudden shutdown at 20–30% on the replacement cell

This happens when the modem or display pulls a high current burst and the cell voltage drops sharply under load — crossing the BMS undervoltage threshold even though the percentage display still reads high. It is a calibration problem, not a defective cell. The fuel gauge IC has not yet mapped where the new cell's voltage cliff sits under real load conditions. Run one full discharge to auto-shutoff followed by an uninterrupted charge to 100%, and the IC recalibrates its cutoff point against the actual cell voltage curve — shutdowns at 20–30% typically stop after that first full cycle.

Compatible Models

EVO Shift 4G

Replaces Part Numbers

35H00146-00M

Technical Specifications

Voltage3.7V
Amp Hours1200mAh
Capacity1200mAh
Rate4.44Wh
Net Weight25.4g /0.90 oz
Gross Weight50g /1.76 oz
Approximate Weight50g /1.76 oz
Dimension 66.67 x 43.56 x 4.40mm

Product Highlights

  • Brand: Sprint
  • 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 EVO Shift 4G powers on normally but shuts off the moment I open the camera or a heavy app — is the new battery faulty?

This is a voltage sag issue, not a defective cell. High-draw loads like the camera sensor and image processor pull a current spike the uncalibrated fuel gauge IC hasn't mapped yet, so the BMS trips the undervoltage cutoff early. Run one complete discharge to auto-shutoff, then charge uninterrupted to 100%. After that full reference cycle, the fuel gauge recalibrates and the BMS cutoff threshold aligns with the new cell's actual voltage floor.

My EVO Shift 4G won't turn on at all after the replacement battery sat in a drawer for several months before I installed it.

A cell stored uncharged for an extended period can drop below 2.5V, which triggers BMS lockout — the protection circuit disconnects the cell to prevent damage and the phone shows no signs of life. Connect the phone to a wall charger and leave it untouched for 20–30 minutes without pressing the power button. Most BMS circuits on this platform will accept a trickle current at that point, slowly recovering cell voltage above the lockout threshold; once voltage climbs above roughly 3.0V the BMS re-engages and the phone will boot normally.

The battery percentage on my EVO Shift 4G jumps erratically — one minute it reads 60%, then it drops to 35% without any use.

The fuel gauge IC on the EVO Shift 4G is still reading against the discharge curve it built for the original cell. The new cell has a different internal resistance and voltage profile, so the coulomb counter loses its position and the percentage display skips around. This is not a hardware fault. Do one full discharge to auto-shutoff followed by a full uninterrupted charge to 100% — that single cycle gives the IC a new reference curve and the percentage display stabilises.

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