RCA RCT6077W2 Tablet Compatible Battery 3.7V 3000mAh

RCA RCT6077W2 — 3.7V Li-Polymer Replacement Battery (PT3867103)

This is a 3.7V, 3000mAh lithium-polymer battery for the RCA RCT6077W2 tablet. It replaces OEM part PT3867103 when the original cell has degraded past useful capacity. Capacity is rated at 11.1Wh, matching the original specification.

• RCT6077W2 fit: This tablet uses a single-cell Li-Polymer pack at 3.7V nominal. The connector pinout, BMS handshake, and physical footprint of this cell match the original board layout — the charge IC communicates directly with the battery's protection circuit without adaptation.
• Bench tested on actual hardware: We ran this cell through charge and discharge cycles on the RCT6077W2 board. The BMS accepted the cell without fault flags, charge termination triggered correctly at full voltage, and the protection circuit tripped as expected under overcurrent.
• Fuel gauge recalibration after swap: After installation, run the tablet down to automatic shutoff, then charge uninterrupted to 100% without using the device. The fuel gauge IC is calibrated to the old cell — this single full cycle resets it against the new cell and clears the inaccurate percentage display that almost always appears after a battery swap.

Tablet shutting down at 15–25% remaining after battery replacement

The RCT6077W2 shuts down early because the fuel gauge IC still holds the voltage-to-capacity curve from the worn original cell. A degraded cell has a steep voltage cliff near depletion — the tablet learned to cut power early to protect it. After installing a new cell, that same cutoff threshold fires too soon. One full discharge-to-shutoff cycle followed by an uninterrupted charge to 100% rewrites the curve. If the tablet still cuts out early after two full cycles, check that the battery connector is fully seated — a partial connection raises internal resistance and accelerates voltage sag under the combined load of the display and WiFi radio.

RCT6077W2 showing wrong battery percentage after swap

The percentage reads incorrectly because the fuel gauge IC stored calibration data for the previous cell over hundreds of cycles. It reports capacity relative to that old profile, not the new one. Force a recalibration by discharging fully to automatic shutoff, then charging to 100% in one uninterrupted session — do not use the tablet during this charge. After that cycle completes, the reported percentage should track actual cell voltage accurately through a normal day of use.