If its peak, then you may get more time. The simple, and flawed, answer is that a 12V/20AH battery will supply 12*20 = 240 Watts of power for an hour. So if you use 35W, the battery will last 240/35 = 6.8 hours. This is the theoretical answer.
Is a 35AH battery enough for a trolling motor?
If the 35 Ah battery is a lithium battery you should get almost all of it's stated capacity, so you could run about an hour or more on speed “5”.
How long will 35AH battery last trolling motor?
Lasts at least 4+ hours of fishing, running the motor a lot. I bought a second one so that I have the option to switch when I come ashore for lunch. Generally, 4-5 hours is long enough to fish, though. Nice to not have a heavy battery to lug around.
What is the minimum voltage for a deep cycle battery?
Deep Cycle Batteries in a cycling application require a recharging voltage of 2.43 to 2.45 volts per cell. This is 14.6/14.7 volts for a 12 volt nominal installation and 29.2/29.4 volts in a 24 volt site.
What is a good reading for a deep cycle battery?
Read the multimeter. A 12-volt deep cycle battery in good condition has a reading of between 12.4 and 12.7 volts; consider a replacement battery if the reading is lower than 12.4 volts. A 6-volt battery in good condition will read between 6.2 and 6.3 volts.
What should a fully charged 12 volt deep cycle battery read?
Voltage on a fully charged battery will read 2.12 to 2.15 volts per cell, or 12.7 volts for a 12 volt battery. At 50% the reading will be 2.03 VPC (Volts Per Cell), and at 0% will be 1.75 VPC or less.