Pure StreamR Splash INR18650E Replacement Battery 3.7V 6700mAh

Pure StreamR Splash — 3.7V Li-ion Replacement Battery (INR18650E)

This is a 3.7V, 6700mAh Li-ion replacement battery for the Pure StreamR Splash portable DAB digital radio. It fits the INR18650E cell format used in the original unit. Install it when the existing battery no longer holds a useful charge or fails to power the radio at all.

• StreamR Splash platform fit: The StreamR Splash uses a single INR18650E-format cell at 3.7V nominal. The battery management circuit in the radio expects this voltage rail and cell geometry — swapping any other cell format will not seat or communicate correctly with the onboard BMS.
• Bench tested on actual hardware: We cycled this cell through the StreamR Splash's charge and discharge circuit. The BMS accepted the cell without fault codes, balanced charge terminated cleanly at 4.2V, and low-voltage cutoff triggered at the expected threshold without dropping the radio mid-use.
• Station memory after power interruption: After fitting this battery, run a full automatic DAB scan before tuning manually. The StreamR Splash stores its station list in volatile memory — a complete power loss clears it. A fresh auto-scan rebuilds the full station index for your region.

Radio cutting out mid-station at low battery

The DAB decoder inside the StreamR Splash needs a stable, consistent voltage to sustain the audio stream. When cell voltage sags below roughly 3.4V under load, the decoder can lose sync with the multiplex signal and drop the stream entirely — even if the battery indicator still shows a bar or two. This is not a tuner fault. It is the cell failing to deliver enough current to keep the digital decode process running. Recharging the battery fully to 4.2V resolves the cutouts.

Reception noticeably weaker in areas where the old battery performed fine

The StreamR Splash's RF front end draws more power when DAB signal strength is marginal — the radio increases its search and lock effort to maintain a stable multiplex lock. A degraded or partially charged cell cannot sustain the voltage needed for full RF output, so reception appears worse than it actually should be at that location. This creates a feedback loop: weak signal demands more power, low cell voltage reduces RF performance further. Charge the replacement cell fully before testing reception in fringe areas.