Aiper MT600 Robotic Pool Cleaner Replacement Battery 14.8V 3400mAh

Aiper MT600 — 14.8V Li-ion Replacement Battery (INR18650-4S1P)

This 14.8V, 3400mAh Li-ion pack replaces the original battery in the Aiper MT600 robotic pool cleaner. It runs the drive motors, suction impeller, and onboard navigation through a full cleaning cycle. Voltage and capacity match the stock pack exactly — 14.8V nominal, 50.32Wh total.

• MT600 compatibility: The MT600 uses a 4S1P 18650 cell configuration to hit the 14.8V rail its motor controller expects. Swapping to a different voltage or cell count causes the BMS to reject the pack or the motor to run off-speed. This replacement holds the same 4S arrangement and connector pinout the MT600 expects.
• Bench tested on actual hardware: We ran this pack through motor-start surge cycles simulating peak suction draw. The BMS held through inrush current spikes without tripping the overcurrent cutoff, and cell voltage balance stayed within 20mV across all four cells after discharge.
• Post-session rinse before charging: After each pool session, rinse the battery housing with fresh water before placing the unit on charge. Chlorine and salt residue on the terminals builds contact resistance over time, which can read to the charger as a capacity drop rather than a chemical build-up issue.

MT600 stopping mid-cycle on a new battery

When the MT600 drives over heavy debris, the impeller motor pulls a sharp current spike. If the BMS reads that spike as an overcurrent fault, it cuts power to protect the cells — even with a full charge. This is more common in pools with fine sand or compacted leaf debris, where suction resistance is highest. Reducing the suction setting by one level on the first few cycles lets the BMS learn the draw pattern without tripping. If cut-outs continue, check that the battery terminals are fully seated and dry — any resistance at the contact point amplifies the apparent current spike the BMS sees.

MT600 not completing a full pool cycle before shutting down

A shortened cycle on a new pack usually means the battery went into storage below 3.0V per cell and the BMS is restricting charge acceptance. Charge the pack fully before first use — plug it in and leave it until the indicator shows complete, then run a full cycle. If capacity still seems short after two full charge-discharge cycles, check the suction power setting — high-power mode draws significantly more current per metre of pool floor. At 14.8V nominal, a fully charged pack should read 16.6–16.8V off the charger before the first run.