About this replacement
Eufy Homevac H30 — 14.4V Li-ion Replacement Battery (T2522)
This is a 14.4V Li-ion replacement battery for the Eufy Homevac H30 cordless handheld vacuum. It carries 2250mAh (32.4Wh) capacity and fits directly in place of OEM part T2522 and T2522111-80. When the original cell degrades and the vacuum cuts short mid-clean, this replaces it.
- Homevac H30 fit: The H30 uses a 14.4V cell with a specific BMS handshake that controls motor start current and low-voltage cutoff. This battery matches the connector, voltage rail, and BMS communication the H30 expects — if any of those are off, the vacuum will not power on or will cut out immediately under load.
- Bench tested on actual hardware: We ran this cell through motor start cycles on the H30 and confirmed the BMS held the correct cutoff threshold without tripping on startup surge. Voltage held stable through sustained suction on both bare floor and carpet attachments.
- Dock charging on the H30: Do not leave the H30 sitting on the dock after it reaches full charge. Cordless vacuums kept on continuous dock charge develop capacity fade significantly faster than those charged only when depleted. Charge fully, then remove it from the dock.
Suction dropping before the battery indicator shows low
The H30's motor draws harder when the filter is partially blocked — airflow restriction forces the motor to compensate, and that extra current load causes voltage sag in the cell before the indicator registers a low-battery state. The result is noticeably weaker suction while the lights still suggest plenty of charge. Clean or replace the filter first. If suction recovers with a clean filter, the battery was not the cause. If suction remains weak with a clean filter and a charged cell, check that the cell is holding above 12.8V under load.
Motor cuts out mid-clean and then recovers after a few seconds
This is a BMS overcurrent trip, not a dead battery. When the vacuum's airpath is restricted — blocked nozzle, clogged filter, or debris caught in the head — the motor strains against the restriction and briefly spikes current beyond the BMS threshold. The BMS cuts power to protect the cell, then resets. Clear the blockage, check the filter, and try again. If the cut-outs continue with a clean, unobstructed vacuum, the cell may be aged and sagging below the BMS's minimum voltage window under load.