Hello, thank you for asking!How many ah is the 52v version of the new battery
For Dorado 21700 505L(65pcs 21700 cells), max 52V 20AH, 14S4P 56pcs of Samsung 50E 21700 cells, continuous discharging current about 40Amps
For Dorado 21700 440L(52pcs 21700 cells), max 52V 15AH, 14S3P 42pcs of Samsung 50E 21700 cells, continuous discharging current about 30Amps
Please kindly note that the Samsung 50E each cell nominal capacity is 4900mAh(4.9AH), but usually it is counted as 5000mAh(5Ah) for easier counting.
Each single Samsung 50E cell continuous discharge rate 2C(capacity)=2*4.9=9.8Amps, counted as 10Amps, peak discharge rate 3C=3*4.9=14.7Amps, counted as 15Amps.
Thus we can conclude 14S4P 52V 20AH, which can continuously discharge current 40Amps, peak 60Amps.
But the BMS is choosed depending on the motor power. The BMS max allowing current should be 50% higher than continuous discharging current to protect the battery.
Dorado 21700 505L, 52V 20AH, used for a 1000W rated motor, demanding about 20Amps continuous discharging current, we need choose 30Amps BMS, peak allowing 100±20Amps.
Dorado 21700 505L, 52V 20AH, used for a 1500W rated motor, demanding about 30Amps continuous discharging current, we need choose 45Amps BMS, peak allowing 135±20Amps.
Dorado 21700 505L, 52V 20AH, used for a 2000W rated motor, demanding about 40Amps continuous discharging current, we need choose 60Amps BMS, peak allowing 180±20Amps.
1000W or 1500W motor are both available for use, but 2000W is not suggested, since the battery has to constantly discharge at its ultimate capabililty, which might shorten the battery lifetime.
Recently some people come to me and ask for the upgrade battery for upgrade 2300W rated motor.
The maxium 52V 20AH is not available for 2000W, much less for 2300W.
Could you pls tell what is the motor power you will use with the 52V Dorado battery? Thanks!