About this replacement
AEi VX-8x08 / AGR-8206 Series — 3.7V Li-ion Replacement Battery (8206)
This is a 3.7V 1100mAh Li-ion battery for the AEi VX-8x08, AGR-8106, AGR-8206, and MIP-300 cordless handsets. It replaces OEM part numbers 8206 and 8106. The cell dimensions are 53.00 × 33.90 × 5.50mm — confirm those against your existing battery before ordering.
- VX-8x08 and AGR series compatibility: These handsets share the same battery bay geometry, connector polarity, and 3.7V Li-ion cell specification across the VX-8x08, AGR-8106, AGR-8206, and MIP-300 platforms. One battery SKU covers all of them because the BMS handshake requirements and charge termination voltage are identical.
- Bench tested on actual hardware: We cycled this cell on a cordless phone test rig and confirmed the BMS holds charge termination at 4.2V without triggering the base station's fault indicator. The protection circuit activates correctly at low-voltage cutoff before the handset powers off.
- First charge after installation: Place the handset in the base cradle immediately after installing this battery and leave it for a full uninterrupted charge cycle. Li-ion cells shipped in a partially discharged state — letting the base complete one full charge before first use brings the cell to its rated 1100mAh baseline.
Talk time shorter than expected after swapping the battery
A new Li-ion cell often delivers noticeably less talk time for the first two or three charge cycles. This happens because the cell ships at a storage charge level — typically around 40–50% — and the electrodes haven't yet settled into full charge-acceptance. After three complete charge and discharge cycles on the base, capacity stabilises at the rated 1100mAh. If talk time is still short after five cycles, check the handset's standby current draw — some AEi models have a backlight or alert setting that keeps the radio active longer than normal.
Base station shows no charge light or error after installing the new battery
When a Li-ion cell arrives below approximately 3.0V from extended storage, some base stations refuse to begin charging — the charge controller sees the voltage as a fault condition rather than a depleted cell. Remove the handset, wait 30 seconds, and reseat it firmly so the contacts align. If the charge light still doesn't appear, check the base contacts for oxidation and clean them with a dry cloth. The base should begin trickle charging once the cell is above 3.0V — a short boost from a compatible Li-ion charger at 0.1A for 10 minutes is enough to cross that threshold.