Tesla RoboStar T50 Replacement Battery 14.8V 2600mAh

Tesla RoboStar T50 / T60 / T80 Pro — 14.8V Li-ion Replacement Battery

This is a 14.8V, 2600mAh (38.48Wh) lithium-ion battery for the Tesla RoboStar T50, T60, and T80 Pro robotic vacuum cleaners. It replaces the original cell when capacity has faded and cleaning cycles have shortened noticeably. Same voltage, same form factor — fits the original battery bay without modification.

• T50, T60, and T80 Pro compatibility: All three models share the same 14.8V battery architecture, connector pinout, and BMS handshake protocol. A single cell revision covers the full range without cross-wiring or adapter work.
• Bench tested on actual hardware: We ran this cell through charge and discharge cycles on the T50 platform. The BMS accepted the cell without fault codes, current draw matched rated spec under normal suction load, and protection circuits tripped correctly on simulated blockage.
• Dock charging habit on robotic vacuums: Do not leave the RoboStar sitting on its dock continuously between uses. These vacuums on permanent dock charge develop capacity fade faster than those removed after a full charge. Charge to full, then lift it off the dock until the next scheduled clean.

Suction dropping before the battery indicator reaches low

This happens when the motor is drawing more current than rated due to a partially blocked filter or brush roll restriction. The BMS reads the overcurrent spike as a low-capacity event and reduces power to the motor before the display catches up. It is not always a battery fault. Clean the filter and check the brush roll for hair wrap before replacing the cell — if suction recovers after cleaning, the battery was not the cause.

Motor cutting out mid-cycle and then recovering on its own

This is a BMS overcurrent trip, not a mechanical failure. When the vacuum transitions from hard floor to thick carpet, motor load spikes sharply. If the filter is even partially blocked, that spike pushes current past the BMS protection threshold and the circuit opens temporarily. The vacuum pauses, the BMS resets, and the motor restarts — usually within a few seconds. Clean the filter first. If trips continue on a cleared filter with a new battery, check that cell voltage under load stays above 12.0V.