Bamboo CTH-470K Compatible Battery 3.7V 1050mAh

Bamboo CTH-470K Series — 3.7V Li-ion Replacement Battery (1UF553450Z-WCM)

This 3.7V, 1050mAh Li-ion cell replaces the internal battery in Bamboo CTH-470K-xx graphics tablets, including CTH-470K-DE, CTH-470K-EN, CTH-470K-FR, and over 20 additional regional variants. It matches the original cell footprint at 54.92 x 33.94 x 6.00mm and connects via the same OEM connector. Use this when the original cell no longer holds a charge or causes the tablet to shut down unexpectedly.

• CTH-470K regional variant coverage: All CTH-470K-xx variants share the same internal battery bay, connector pinout, and charge IC. The voltage rail and BMS handshake are identical across the DE, EN, FR, and other regional builds — the hardware difference is firmware and regional labelling only, not the battery circuit.
• Bench tested on actual hardware: We cycled this cell through the CTH-470K charge IC and confirmed the BMS accepted the new cell without flagging a fault state. Charge termination triggered correctly at full capacity with no voltage anomalies during the constant-current phase.
• Fuel gauge recalibration after swap: After fitting this cell, run one full discharge to automatic shutoff, then charge uninterrupted to 100%. This resets the fuel gauge IC calibration against the new cell capacity and clears the inaccurate percentage readings that appear immediately after a battery swap.

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

The CTH-470K's fuel gauge IC stores learned discharge curves from the previous cell. When a new cell is installed, the IC applies the old curve to the new chemistry, which causes it to misread the remaining voltage under load. The display backlight and active WiFi together draw enough current to expose this miscalculation — the system sees a voltage cliff and triggers a protective shutdown before the cell is actually depleted. Run one complete discharge cycle to automatic shutoff, then charge to 100% without interruption. After that single cycle, the fuel gauge recalibrates against the actual cell and the early shutdowns stop.

Fast charging unavailable after battery replacement on CTH-470K

The charge controller on the CTH-470K negotiates charge rate based on past accepted charge cycles logged by the power management IC. Immediately after a new cell is installed, the IC has no cycle history for the replacement and defaults to a conservative charge current. This is not a fault — it clears after one full accepted charge cycle from near-empty to 100%. Plug into the original Bamboo charger, allow the tablet to charge to 100% without interruption, and the full charge rate will be available from the next charge session onward.