Alcatel One Touch EVO 7 Compatible Battery 3.7V 4150mAh

Alcatel One Touch EVO 7 — 3.7V Li-Polymer Replacement Battery (CAB4160000C1)

This 3.7V, 4150mAh lithium-polymer battery replaces the original cell in the Alcatel One Touch EVO 7 tablet, including variants listed as T70-2AALDE1 and OT-T70. It matches the OEM voltage, capacity, and connector layout of the stock unit. When the original cell swells, fails to charge, or drops off quickly under load, this is the direct cell swap.

• One Touch EVO 7 and OT-T70 compatibility: The T70-2AALDE1 and OT-T70 share the same battery bay dimensions and connector pinout as the standard EVO 7. All three models use the same 3.7V charge profile and BMS handshake, so one cell fits across the range without modification.
• Bench tested on actual hardware: We ran this cell through the EVO 7 charge IC and confirmed the BMS accepted the full charge cycle without fault codes. Voltage at delivery measured within 3.7V nominal range, and the protection circuit responded correctly to simulated over-discharge conditions.
• Fuel gauge reset after installation: After fitting this cell, run the tablet down to automatic shutoff, then charge it uninterrupted to 100% without using the device. This gives the fuel gauge IC a full sweep to calibrate against the new cell and clears the inaccurate percentage readings that typically appear in the first few cycles post-swap.

Why the EVO 7 shuts down at 15–25% battery remaining

The EVO 7 runs its display backlight and WiFi radio simultaneously under normal use. That combined load pulls more current than the processor alone, and an aged or freshly swapped cell hits a voltage floor earlier than the fuel gauge expects. The system reads enough percentage left but the actual cell voltage drops below the BMS cutoff threshold under that peak draw. After the recalibration cycle described above, the shutoff point typically shifts back down to 3–5%.

EVO 7 battery percentage jumping or reading 0% immediately after swap

The fuel gauge IC in the EVO 7 stores capacity data calibrated to the old cell. When a new cell goes in, the IC has no valid reference point and can report wildly off percentages — including instant 0% or a stuck reading. This is not a fault with the replacement cell. Run one full discharge to automatic shutoff, then charge to 100% without interruption. After that single cycle the gauge IC recalibrates and percentage accuracy returns to normal.