Hi Aaron,RTT, torque in an electric motor is proportional to current, there is no relation to voltage.To make a battery for more torque you need bigger cells, not more cells (higher voltage). This is why cars that need a higher CCA battery get physically larger, but not higher in voltage.
Not sure what you are replying too?
You, above, where you wrote something like ‘higher voltage units like cordless drills have more torque’ - that is not actually true. Torque is proportional to current.Mmm, not this year, you must have found an old post.
The increased torque you see in new tools with higher voltages (the higher voltage is basically a marketing ploy) comes from them generally being ‘brushless’ which means that massive currents can be flown into the windings.
Point taken though.
The higher voltage units, like cordless drills tend to have more torque, but also it enables smaller wires and connectors and faster charging is their main benefit. Note some electric cars will likely come out with higher battery voltages to enable faster charging.Amp.hours (Ah, not aH) mean nothing on their own.
Watt.hours (Wh) are actually what you should be looking for, because you don't need to interpret it by checking on the voltage.
In the case of both of my mowers, they are 36V (18V*2) setups, so the batteries are directly comparable by checking the Ah. The Wh are not listed anywhere so to compare between different voltage systems you'll have to break out google.
EDIT: The bloke next door has a single-battery mower of some specification and it is a complete POS and can only cut about 50m2 of grass at a time, so I assume the battery capacity isn't great no matter what voltage it's running at.
There's probably a reason that manufacturers use the voltage as the headline marketing tactic... :
Single Battery just means its kWh storage is too small to cut more than 50m2 of grass, two batteries would just double that. If you only have 50m2 of grass or willing to do in stints, then it maybe fine for you. My home in Dubai has 18m2 of grass, so it would work for me, however my old acreage in Gladstone, breasts on bull would be more useful.
There, my bolding. Voltage and torque are not correlated. In DC motors voltage and RPM are correlated, and torque and current are correlated.