by Burgerman » 02 May 2016, 02:08
When you say lead acid, what do you mean. ALL lead based batteries used in powerchairs are lrad acid. Usually sealed, deep cycle, or AGM, or Gel. All are lead acid however.
But most are cheap, and too high internal resistance. So low on torque.
Other causes of chairs low on torque may be weak 2 pole motors, low amp controller, or programming settings, or all of these.