Yes, if it will fit.
no. not good idea
It is unlikely that the NB4L battery will work for your lawnmower but it really depends on your mower. Most of these batteries are used for small electronics like cell phones.
As long as the battery in the lawnmower is a 12 Volt battery you will be fine.
You can use, for example, a Yuasa YTZ14S motorcycle battery.
can a 12v lawn mower sealed battery be charged with 12v battery charger use on cars
Any 12 V battery charger will charge a motorcycle battery. But it is best to get one with low amperage such as a 4 to 6 amp battery charger. You can use a trickle charger to keep the battery charged on my motorcycle during storage.
a motorcycle if your right beside it. or a lawnmower
Take the battery to a motorcycle dealer, and you may have luck finding one. You can get a lawnmower battery from any place that sells battery's if they don't have one in stock they should be able to order you one. Just take the old battery with you to compare. Hope this helps.
Very gently. A motorcycle battery can't take as much charging current as a car battery, so you need to use the lowest setting on your charger.
Any good 12 volt battery charger that puts out around 10 amps. Make sure it is an automatic charger. The same charger you use on an auto battery can be used on a motorcycle battery.
Yes.
Lawnmower,Tractor,Motorcycle,Snowmobile