Read the meter. If it has 12.7 DC volts or higher, the battery is good and something else is causing your starting problem. If the voltage reading is lower, the battery is discharged to some degree but may perk up after charging. If it reads 11.5 volts or lower, the battery is most likely sulfated and needs replacing.
How long does a lawn mower battery last per charge?
The LT42 e Lithium-ion electric riding lawn mowerriding lawn mowerRiding mowers, which sometimes resemble small tractors, are larger than push mowers and are suitable for large lawns, although commercial riding lawn mowers (such as zero-turn mowers) can be "stand-on" types, and often bear little resemblance to residential lawn tractors, being designed to mow large areas at high speed ...https://en.wikipedia.org › wiki › Lawn_mowerLawn mower - Wikipedia has a 3000 watt-hour, 60 amp-hour, 56-volt max battery, which provides energy to mow your lawn for up to 1.5 hours, or up to 2 acre per charge.
What kills a lawn mower battery?
Mowers are designed to run at full throttle, which achieves the revolutions per minute needed to recharge a battery. Just a 10 percent reduction in rpm causes a dramatic drop in the effectiveness of the riding mower's battery charging system. As a result, the battery may die between mowings.