LiFePO4 batteries for electric wheelchairs and mobility scooters: 12V in 18Ah, 28Ah, 36Ah and 50Ah, energy from 230Wh to 640Wh and BMS from 20A to 50A, also available with Bluetooth to check the charge left from the app.
Wheelchairs typically use two 12V batteries in series: always replace them as a pair and with identical models, because different capacities create imbalance. The criteria are range in kilometres, which depends on the Wh, and the continuous BMS current, which has to take the motor inrush on a slope.
Against lead-gel, lithium halves the weight for the same energy and loses no capacity if left part-charged, which is normal in everyday use.
