About this replacement
Pure Evoke E-1S / Evoke Flow Series — 3.7V Li-ion Replacement Battery (E1)
This is a 3.7V 10400mAh Li-ion replacement battery for the Pure Evoke E-1S and related DAB+ digital radio receivers. It fits a range of Pure Evoke models including the Evoke Flow and Evoke-2S. Install it when the original pack can no longer hold charge or the radio shuts off before the battery indicator reaches empty.
- Evoke series platform fit: These models share the same battery bay geometry, connector pinout, and 3.7V supply rail. The BMS on each communicates the same charge termination signal to the Pure charging circuit, so this pack slots in without any firmware mismatch.
- Bench tested on actual hardware: We ran this pack through charge and discharge cycles on the Evoke platform. The BMS reported cell voltage accurately at every state of charge, and charge termination triggered cleanly at 4.2V with no overrun.
- DAB scan tip after install: After installing, let the radio complete a full automatic station scan before manually tuning. DAB station lists are held in volatile memory and are wiped when power is interrupted — a fresh scan rebuilds the full list for your region.
Radio cutting out mid-station at low battery
The DAB decoder in the Evoke series requires a stable voltage supply to process the OFDM signal used in DAB+ broadcasts. When the battery sags below the decoder's minimum operating voltage, the stream drops mid-transmission rather than fading gracefully. This is more likely with a degraded original pack than a fresh replacement. If dropouts occur on a new battery, check that the pack is above 3.5V under load before assuming a signal issue.
Reception weaker than expected after fitting a new battery
The Evoke's RF front end draws its highest current when the DAB signal is weak — the radio increases search power to lock onto marginal ensembles. If the battery voltage is not fully recovered from storage, the RF stage gets throttled before it can reach maximum output. Charge the pack to 4.2V on a compatible Pure charger and run the radio for a full session before judging reception quality. A fully charged cell gives the RF circuit the headroom it needs to resolve weak multiplex signals.