A typical riding lawn mower uses a 12-V battery, and a rechargeable battery on. Turn on the digital multimeter and switch it to "DC" or "A" to test battery voltage.
All of the batteries on our riding mowers operate at a nominal 12 volts. It is recommended to fully charge the battery before the first use as well as anytime the battery is not used for longer than 30 days.
Most riding mowers use 12-volt batteries, but some models built before 1980 use a 6-volt battery. Use a charger that matches the voltage for your battery. Also, use a charger with an output of 10 amps or less.
PowerStar U1 Battery For Many Lawn Tractors and Mowers · $103.37. Powerstar 2 year Warranty Battery for John Deere Lawn tractor/Riding Mower 108.
On riding lawn mowers, the battery is usually under the rider seat or somewhere. Charge the battery with the correct voltage level corresponding to the charger,