ETA 1515 Falco Replacement Battery 14.8V 2600mAh Li-ion

ETA 1515 Falco Series — 14.8V Li-ion 2600mAh Replacement Battery

This is a 14.8V, 2600mAh lithium-ion battery pack for the ETA 1515 Falco and related cordless vacuum models. It fits the 1515 Falco, 2515 FalcoSmart, 2512 Aron, and 1515 90000 Falco among others. Replace this cell when the original no longer holds charge or suction power drops off early in a cleaning cycle.

• Falco and Aron platform compatibility: The 1515 Falco, 2515 FalcoSmart, and 2512 Aron share the same 14.8V cell architecture, connector pinout, and BMS communication protocol. Swapping between these models does not require a firmware reset or charger change.
• Bench tested on actual hardware: We ran this cell through charge and discharge cycles on the Falco platform. The BMS handshook correctly with the ETA charger, cell balancing activated across all four cells, and over-current protection tripped as expected under a simulated motor blockage condition.
• Dock charging behaviour on the Falco: Do not leave the Falco sitting on its charging dock continuously between uses. The dock does not terminate charge cleanly — sustained trickle current degrades cell capacity faster than normal discharge cycling. Charge to full, then remove from the dock.

Cordless vacuum losing suction before the battery indicator reaches low

This happens when a partially blocked filter forces the motor to draw more current than its rated load. The extra draw causes voltage to sag at the battery terminals earlier than the state-of-charge indicator expects. The indicator reads remaining charge accurately, but the motor cannot sustain suction at reduced voltage. Clean or replace the filter first — if suction recovers immediately, the battery is not the cause.

Motor cutting out mid-use and then recovering after a short pause

This is a BMS overcurrent trip, not a dead battery. When airflow is restricted — blocked filter, full dustbin, or obstructed nozzle — motor current spikes beyond the BMS threshold and the circuit opens to protect the cells. The BMS resets after a short thermal cool-down, which is why the vacuum starts again a minute later. Clear the restriction, then check that resting cell voltage reads above 15.5V on a multimeter before resuming use.