DLP413239 AEG Fame 510 Cordless Phone Compatible Battery 3.7V 500mAh

AEG Fame 510 — 3.7V Li-ion Replacement Battery (DLP413239)

This is a 3.7V, 500mAh Li-ion battery for the AEG Fame 510 cordless DECT handset. It replaces part number DLP413239 and fits directly into the handset battery compartment. Swap it in when the original pack no longer holds a charge or the handset dies faster than expected between base visits.

• Fame 510 handset fit: The Fame 510 uses a slim single-cell Li-ion pack running at 3.7V nominal — the same voltage rail the DECT transmitter and audio codec expect. The connector and cell dimensions (40.25 × 31.92 × 4.32mm) match the original housing without modification.
• Bench tested on actual hardware: We cycled this pack through charge and discharge on the Fame 510 platform. The BMS accepted charge from the base station without fault, held voltage through a full DECT transmit cycle, and cut off cleanly at the low-voltage threshold.
• First charge after installation: Li-ion cells shipped in storage state arrive at a reduced charge. Place the handset in the base immediately after fitting and leave it for a full charge cycle before use — this lets the BMS complete its first full calibration pass and report accurate charge state to the handset display.

Talk time shorter than expected after fitting a new Li-ion pack

A new Li-ion cell ships partially discharged and the handset's fuel gauge has no reference point yet. Until the BMS has logged at least one full charge-discharge cycle, the handset may underreport remaining capacity and shut down early. Run two or three complete cycles — full charge from the base, then use until the handset signals low battery — and talk time will stabilise at the rated level. If it does not improve after three cycles, check that the handset is seating fully in the base cradle and making clean contact with the charging pins.

Handset loses DECT pairing after battery replacement

Removing the battery from a DECT handset cuts all power to volatile memory, which can wipe the stored base station pairing on some Fame 510 units. The handset powers up but shows no base connection or displays a registration error. Re-register the handset using the base station's pairing button — on most AEG DECT bases this means holding the registration button on the base for three seconds, then confirming on the handset within 60 seconds. Once re-paired, the handset resumes normal operation at full transmit power.