HP Slate6 VoiceTab HSTNH-B19C Replacement Battery 3.8V 3000mAh

HP Slate6 VoiceTab — 3.8V Li-Polymer Replacement Battery (HSTNH-B19C)

This 3.8V 3000mAh Li-Polymer battery replaces the original HSTNH-B19C cell in the HP Slate6 VoiceTab and Slate 6 VoiceTab II Dual SIM tablets. It fits the 6-inch slate form factor and restores power to the processor, display, and cellular connectivity hardware. Capacity is 11.4Wh, matching the original specification.

• Slate6 VoiceTab series compatibility: The Slate6 VoiceTab, Slate 6 VoiceTab II Dual SIM, 6301RA, and related Dual SIM variants all share the same 3.8V power rail, connector pinout, and BMS handshake protocol — which is why a single part number covers the full lineup.
• Bench tested on actual hardware: We ran this cell through charge and discharge cycles on a Slate6 VoiceTab unit. The BMS accepted the new cell without fault codes, and the protection circuit responded correctly to both overcharge and undervoltage cutoff thresholds.
• Fuel gauge recalibration after swap: After installation, run the tablet down to automatic shutoff, then charge uninterrupted to 100%. This forces the fuel gauge IC to recalibrate against the new cell and clears the inaccurate percentage readings that commonly appear after a battery swap.

Slate6 VoiceTab shutting down at 15–25% battery remaining

This shutdown happens when the display and active LTE or WiFi radios draw simultaneous peak current. Under that combined load, the cell voltage drops sharply — hitting the BMS undervoltage cutoff even though the OS still shows charge remaining. The fuel gauge IC on the Slate6 VoiceTab is calibrated to the old cell's discharge curve, so the reported percentage doesn't reflect the actual voltage cliff. One full discharge-to-shutoff cycle followed by an uninterrupted charge to 100% resets that calibration and pushes the cutoff point back to where it belongs, typically below 5%.

Fast charging not available after battery replacement on the Slate6 VoiceTab

If the tablet reverts to slow charging after a swap, the charge IC is completing its first handshake with the new cell. On Li-Polymer packs, the charge controller runs a trickle phase before stepping up to full current — this can look like fast charge is gone but it isn't. Complete one full charge cycle without interrupting it. After that cycle, the charge IC locks in the correct current profile and the charge speed returns to normal. If it doesn't, verify the charger output is at least 5V/2A.