Tchibo Kompact 106 Replacement Battery 3.7V 650mAh Li-ion

Tchibo Kompact 106 — 3.7V Li-ion Replacement Battery

This is a 3.7V, 650mAh (2.41Wh) Li-ion cell for the Tchibo Kompact 106 mobile phone. It slots into the battery bay and restores normal call, messaging, and standby function when the original cell has degraded or failed. Capacity figures come from the product specification — not estimated from third-party listings.

• Kompact 106 fitment: The Kompact 106 uses a compact form-factor cell at 53.05 x 33.48 x 4.78mm. This replacement matches those physical dimensions and the 3.7V nominal rail the phone's charge IC expects. Swapping a mismatched voltage cell will trip the protection circuit immediately.
• Bench tested on actual hardware: We cycled this cell through charge and discharge on the bench with the BMS active. The protection circuit engaged correctly at low-voltage cutoff and the charge IC accepted the cell without fault flags on the test rig.
• Fuel gauge recalibration after swap: On first use after installation, run one full discharge down to automatic shutdown, then charge uninterrupted to 100% before normal use. This lets the fuel gauge IC map the new cell's discharge curve accurately — skipping this step causes the percentage counter to drift from the first hour of use.

Why the Kompact 106 reports wrong battery percentage after a cell swap

The fuel gauge IC in the Kompact 106 stores a learned discharge curve from the original cell. When a new cell goes in, that stored curve no longer matches the actual voltage-to-capacity relationship of the replacement. The gauge reads voltage and maps it to a percentage using old data, so it can read 40% when the cell is nearly flat — or 80% when it is actually lower. One complete discharge-charge cycle rewrites the reference data the IC uses for all future readings.

Sudden shutdown at 20–30% remaining on the replacement cell

This is a voltage-cliff issue, not a capacity problem. Under load from the radio modem or screen backlight, the cell voltage drops faster than the fuel gauge IC anticipates, crossing the hardware cutoff threshold while the display still shows 20–30%. It is most common in the first few cycles before the gauge recalibrates. Run one full uninterrupted discharge cycle to shutdown, then charge to 100% — after that, the IC will cut the percentage display more accurately and the sudden shutdowns should stop.