Evolveo RoboTrex H11 Replacement Battery 14.8V 2200mAh

Evolveo RoboTrex H11 — 14.8V Li-ion Replacement Battery

This is a 14.8V, 2200mAh Li-ion replacement battery for the Evolveo RoboTrex H11 robotic vacuum cleaner. It slots into the H11's underside battery bay and restores power to the drive motors, brush roll, and suction fan. Capacity is 2200mAh (32.56Wh) — matched to the original specification.

• RoboTrex H11 platform fit: The H11 runs a 14.8V four-cell Li-ion pack to power both the navigation controller and the cleaning motor from a single rail. This battery matches that voltage requirement and the physical bay dimensions — 70.19 x 37.17 x 36.96mm — so the pack seats correctly and the contacts align.
• Bench tested on actual hardware: We cycled this pack through full discharge and recharge sequences, monitoring cell balance across all four cells. The BMS held charge termination cleanly and did not trip on motor start current.
• Dock charging habit on the H11: Do not leave the H11 sitting on its dock continuously between uses. Robotic vacuums on permanent dock contact trickle-charge the pack constantly, which accelerates capacity fade on Li-ion cells. Charge to full, then remove from the dock until the next clean.

Suction dropping before the battery indicator reaches low on the H11

When the H11's suction fan motor hits a restricted airflow path — blocked filter or full dustbin — it draws more current than the rated load. The BMS reads this as a voltage sag event and throttles output before the battery indicator registers low. The result is weaker suction with what looks like a healthy charge remaining. Clean the filter and empty the bin first; if suction recovers immediately, the battery is not the cause.

H11 motor cutting out mid-clean and then restarting on its own

This is a BMS overcurrent trip, not a dead battery. When suction is sustained against a blockage or a heavily loaded carpet, current spikes past the BMS protection threshold and the pack disconnects momentarily. The BMS resets automatically once current drops, which is why the unit restarts without intervention. Clear any brush roll tangle and check that the filter is not clogged — restricted airflow forces the motor to work harder and repeat the trip cycle. If the cutout continues on a clean filter with no blockage, measure pack voltage at rest; a healthy cell should read above 15.5V after a full charge.