PBS KIDS PBSKD12 Replacement Battery 3.7V 3000mAh

PBS KIDS PBSKD12 — 3.7V Li-Polymer Replacement Battery (NV3854120)

This 3.7V, 3000mAh Li-Polymer battery replaces part number NV3854120 in the PBS KIDS PBSKD12 tablet and the PBKRWM5410 and PBS KIDS 7" Pad. It matches the original cell format — 117.00 x 53.25 x 3.80mm — so it sits flush in the battery bay without modification. Swap it in when the original cell no longer holds a charge or the tablet won't power on past the boot screen.

• PBSKD12, PBKRWM5410, and 7" Pad compatibility: All three models share the same battery bay dimensions, connector pinout, and 3.7V power rail, so one cell covers the full group. The charge IC communicates identically across these variants.
• Bench tested on actual hardware: We ran this cell through charge and discharge cycles on the PBSKD12 platform. The BMS accepted the charge handshake without fault flags, and the protection circuit responded correctly to over-discharge cutoff thresholds.
• Fuel gauge reset after installation: After fitting this battery, run the tablet down to automatic shutoff, then charge it uninterrupted to 100% before using it again. This single full cycle lets the fuel gauge IC calibrate against the new cell and clears the inaccurate percentage readings that appear right after a swap.

PBS KIDS PBSKD12 shutting down at 15–25% remaining

This happens when the display backlight and WiFi radio pull current simultaneously, causing a brief voltage sag that the fuel gauge reads as a depleted cell. The old battery's charge curve was mapped to a degraded cell, so the OS shuts down well before the new cell is actually empty. One full discharge-to-shutoff followed by a complete uninterrupted charge corrects the calibration. After that cycle, the tablet should run down to single digits before cutting off.

Fast charging not available after battery swap on the PBSKD12

Some units won't negotiate fast charge on the first cycle after a new battery is installed. The charge IC needs at least one complete accepted charge cycle before it re-enables higher current draw from a compatible adapter. Use the original PBS KIDS charger, let the tablet charge to 100% without unplugging early, then check again on the next session. If fast charge still doesn't appear, confirm the adapter output rating — the tablet requires the correct voltage and current spec to trigger the faster charge mode.