About this replacement
Albrecht DR 855 / DR 860 — 3.7V Li-ion Replacement Battery (27856)
This is a 3.7V 6800mAh Li-ion replacement battery carrying OEM part number 27856. It fits the Albrecht DR 855 and DR 860 portable DAB+ digital radios. Voltage and capacity match the original specification exactly.
- DR 855 and DR 860 compatibility: Both models share the same battery bay dimensions, 3.7V supply rail, and connector pinout. The DR 860 is a close revision of the DR 855 — same BMS handshake requirements, same physical form factor at 66.00 × 36.90 × 18.80mm.
- Bench tested on actual hardware: We ran this cell through charge and discharge cycles on DAB receiver hardware. The BMS accepted charge from the onboard controller without fault flags, and voltage held steady above the DAB decoder's minimum supply threshold during active stream playback.
- Post-install station scan: After fitting this battery, let the radio complete a full automatic station scan before using manual tuning. DAB radios store station lists in volatile memory. A power interruption — even a brief one during a battery swap — clears that list. A fresh auto-scan rebuilds it correctly.
Radio cutting out mid-station at low battery
DAB stream decoding is more voltage-sensitive than analogue FM. The decoder chip needs a stable supply — typically above 3.2V — to reassemble the OFDM signal without errors. When the battery sags below that threshold, the radio doesn't fade like FM; it drops the stream entirely or cuts to silence. This cell's 6800mAh capacity keeps voltage above the cutoff point for significantly longer than a degraded original cell. If dropouts start, check battery voltage under load — below 3.2V, swap the cell.
Reception worse than expected after a battery swap
A weak DAB signal forces the radio's RF front end to draw more current to maintain lock on a multiplex. If the replacement battery has high internal resistance — common in counterfeit or heavily cycled cells — voltage sags during those high-draw RF moments and the tuner loses sync. This cell's Li-ion chemistry keeps internal resistance low across the charge cycle. If reception is still poor after a full charge, confirm the radio is running the latest firmware and that the aerial is fully extended — DAB at 3.7V nominal supply needs both.