Lefant U180 12.8V Replacement Battery 91471 4000mAh Warranty:Warranty 1 Year The Optio A-series uses a

The Optio A-series uses a voltage-threshold system to estimate charge level

It is a calibration gap — not a faulty battery

and the protection circuit tripped correctly at the low-voltage cutoff threshold without nuisance shutoffs at partial discharge

Maintenance-Free: No fluid maintenance required

One full discharge below 10% followed by a complete charge resets the coulomb counter and aligns the gauge to the new cell

Lefant U180 12.8V Replacement Battery 91471 4000mAh Warranty:Warranty 1 Year The Optio A-series uses aLefant U180 12. 8V LiFePO4 Replacement Battery (91471) This is a 12. 8V, 4000mAh LiFePO4 replacement battery for the Lefant U180 robot vacuum cleaner. It replaces OEM part 91471 and powers the U180's drive motors, suction system, and navigation electronics. Fit this when the original cell no longer holds a charge or suction performance has dropped noticeably. U180 platform fit: The U180 runs a 12. 8V LiFePO4 rail a chemistry choice that keeps cell