Alcatel A3 Plus Replacement Battery TLI025B7 3.8V 2200mAh

Alcatel A3 Plus / 5011A — 3.8V Li-ion Replacement Battery (TLI025B7)

This is a 3.8V, 2200mAh Li-ion replacement battery for the Alcatel A3 Plus and 5011A smartphones. It slots into the same battery bay as the original TLI025B7 and connects via the stock flex connector. Swap it in when the original cell no longer holds charge through a normal day of use.

• A3 Plus and 5011A compatibility: Both the A3 Plus and 5011A run on the same 3.8V power rail, use an identical connector pinout, and share the TLI025B7 BMS handshake. One cell covers both variants without modification.
• Bench tested on actual hardware: We ran this cell through charge and discharge cycles on an A3 Plus unit. The BMS accepted charge on the first connection, protection thresholds triggered correctly at the low-voltage cutoff, and the charge IC registered a full cycle without error flags.
• Fuel gauge recalibration on first use: After installation, disable fast charging and run one complete discharge-to-charge cycle before returning to your normal charging habits. This gives the fuel gauge IC time to map the new cell's discharge curve before high-current charging pushes into an uncalibrated state.

Sudden shutdown at 20–30% on the replacement cell

This happens because the fuel gauge IC is still calibrated to the old cell's voltage curve. When the modem fires up or the screen brightness peaks, the new cell's voltage dips sharply — faster than the old curve predicts — and the phone reads it as a critical low-voltage event. The device shuts down even though the reported percentage looks safe. One full discharge cycle, draining to the automatic cutoff and then charging to 100% without interruption, resets the coulomb counter against the new cell and clears the shutdown behaviour.

Phone warm near the battery on the first few charges

A fresh cell has slightly higher internal impedance than a broken-in one. During the first few charge cycles, the charge IC pushes current into that higher-impedance cell, and the extra resistance converts some energy to heat. This is normal and tapers off after three to five full cycles as the cell's impedance settles. If the warmth continues beyond five cycles or concentrates near the USB port rather than the battery bay, check the charge cable and port for debris first — a dirty connector raises contact resistance and keeps the charge IC working harder than it should.