Okami U100 Cordless Vacuum Replacement Battery 14.4V 2600mAh

Okami U100 / U80 Pet Series — 14.4V Li-ion Replacement Battery

This is a 14.4V, 2600mAh Li-ion battery for the Okami U100, U100 Plus, and U80 Pet cordless vacuum cleaners. It slots into the same battery bay as the original and connects to the same BMS circuit. Capacity is rated at 37.44Wh and matches the voltage rail these motors run on.

• U100, U100 Plus, and U80 Pet fit: All three models share the same 14.4V battery platform, connector pinout, and BMS handshake protocol. One battery covers the full range without modification.
• Bench tested on actual hardware: We ran this cell through charge and discharge cycles on the U100 platform. The BMS communicated correctly with the charger, accepted a full charge without fault codes, and delivered consistent voltage output under motor load.
• Dock charging on these vacuums: Remove the vacuum from the charging dock once the battery reaches full charge. The U100 dock does not cut trickle current automatically — leaving it connected after full charge accelerates cell degradation faster than normal use does.

Suction dropping before the battery indicator reaches low

On the U100, the motor draws significantly more current when the filter is even partially blocked. That elevated draw causes voltage to sag under load before the indicator registers a low state. The vacuum reads cell voltage at rest, not under load, so the indicator lags behind actual performance. Clean the filter first — if suction recovers, the battery is not the issue. If voltage under load still sags below 12V with a clean filter, the cell has degraded.

Motor cuts out mid-use and restarts after a few seconds

This is a BMS overcurrent trip, not a power failure. When sustained suction restriction forces the motor to draw above the BMS threshold, the protection circuit opens and disconnects output. It resets automatically once current demand drops. The fix is clearing the blockage or cleaning the filter before the next run. If cut-outs continue with an unobstructed airpath, check that battery voltage at rest reads at least 14.4V on a multimeter after a full charge cycle.