T-Mobile Revvl 6 Pro 5G Compatible Battery TM001 3.87V 4500mAh

T-Mobile Revvl 6 Pro 5G — 3.87V Li-Polymer Replacement Battery (TM001)

This 3.87V, 4500mAh (17.42Wh) Li-Polymer battery replaces the original TM001 cell in the T-Mobile Revvl 6 Pro 5G, TMAF035G, and Revvl V Plus 5G smartphones. It targets phones that shut down unexpectedly, drain fast under 5G load, or no longer hold a charge through a normal day. Dimensions are 88.00 × 62.70 × 4.00mm — a direct physical match to the original cell bay.

• Revvl 6 Pro 5G / TMAF035G / Revvl V Plus 5G fitment: All three models share the TM001 cell format, voltage rail, and connector pinout. The BMS handshake on each device expects a 3.87V nominal cell — this replacement meets that requirement without triggering a voltage mismatch fault.
• Bench tested on actual hardware: We ran this cell through charge and discharge cycles on the Revvl 6 Pro 5G platform. The BMS accepted the cell without error flags, fast charge negotiation completed on the second cycle, and the fuel gauge IC tracked state-of-charge without erratic jumps after one full calibration cycle.
• First-cycle calibration tip: On first use after installation, disable fast charging for one complete discharge-charge cycle. The fuel gauge IC calibrates its coulomb counter against the new cell's discharge curve — running fast charge into an uncalibrated cell causes the OS to misread remaining capacity from the first day.

Sudden shutdown at 20–30% on the Revvl 6 Pro 5G

A degraded original cell develops high internal impedance. Under the combined load of a 5G modem, screen, and background apps, the cell voltage collapses faster than the fuel gauge IC can track — the phone shuts off while the OS still shows 20–30% remaining. This is a voltage cliff, not a capacity readout error. The new 4500mAh cell has lower impedance, so it sustains voltage under peak load without that cliff. After one full discharge-charge cycle, the fuel gauge IC recalibrates its curve to the new cell and percentage readings stabilise.

USB-PD fast charge not accepted on the first cycle after fitting

On the first charge after a cell swap, the Revvl 6 Pro 5G charge IC sometimes falls back to standard 5W charging instead of negotiating fast charge. This happens because the charge IC rechecks BMS parameters on first contact with a new cell and may not complete the handshake until the cell has been partially cycled. Plug in via USB-PD, let the first charge run to 100% at whatever rate it accepts, then unplug and reconnect — fast charge negotiation completes correctly on the second cycle. If it still defaults to 5W after two cycles, check that the cable and adapter both support USB-PD at 18W or above.