Caliber HPG 316D DAB+FM Receiver Replacement Battery 3.7V 1200mAh

Caliber DAB+FM Receiver HPG 316D — 3.7V Li-ion Replacement Battery

This 3.7V 1200mAh Li-ion cell replaces the internal battery in the Caliber HPG 316D portable DAB+/FM radio receiver. It measures 53.00 × 33.90 × 5.70mm and delivers 4.44Wh of stored energy. Fit it when the original cell no longer holds a useful charge or fails to power on.

• HPG 316D fit: The HPG 316D uses a slim single-cell Li-ion pack at 3.7V nominal. This cell matches that voltage rail, physical footprint, and connector orientation — the BMS in the receiver will recognise and manage it as expected.
• Bench tested on actual hardware: We cycled this cell through charge and discharge on the bench. The BMS accepted the cell without fault codes, held charge termination cleanly at 4.2V, and showed no voltage instability at the low-draw current the HPG 316D's DAB+ tuner pulls.
• Fuel gauge recalibration after install: After fitting this cell, run one full discharge to near-empty before recharging completely. The HPG 316D's fuel gauge IC was calibrated to the old cell's discharge curve. One full cycle resets that reference so the percentage readout tracks accurately against the new cell.

Why the HPG 316D shows wrong battery percentage after a cell swap

The HPG 316D uses a fuel gauge IC that builds its percentage estimate from a stored discharge curve of the original cell. When a new cell goes in, that stored curve no longer matches the actual cell chemistry — so the displayed percentage drifts. The gauge reads high early in discharge and then drops suddenly near the end. One complete discharge-to-charge cycle forces the IC to re-map against the new cell's real voltage-capacity relationship. After that cycle, percentage tracking stabilises.

HPG 316D shuts off unexpectedly while the display still shows charge remaining

This happens when cell voltage drops below the BMS cutoff threshold — typically around 3.0V — faster than the fuel gauge predicted. On a degraded or deeply discharged replacement cell, internal resistance is elevated, so voltage sags sharply under the tuner's active load even when the resting voltage appeared healthy. The receiver's protection circuit interprets that sag as a low-cell condition and cuts power. Charge the cell fully to 4.2V, then run the recalibration cycle described above before normal use.