The Fossil JR7978 takes two button cell batteries. The larger battery is LR41 and its a smaller battery 377. To my understanding the larger battery is for the time and the smaller battery is what powers the dial display.
Fossil watches with hybrid smartwatch technology use a replaceable coin cell battery, typically a CR2430 or CR2450. These batteries last for several months to a year, depending on usage. It's recommended to use the specific battery type suggested by Fossil to ensure optimal performance.
Depending on the size of the fossil, anything from a micrometre to a metre.
When you go to buy a battery they can tell you the correct size.
Depends on the size of the engine in the boat.
Most use a small 12 volt battery.
The fuse you use is determined by the load on the circuit and the size wiring used in that circuit not the battery voltage.
They use a 1/3N 3 volt battery. AimPoint models which do not use AA batteries also use the same battery.
AAA
You can use modern size C
NS40 or NS60
id depends on the size of the car and if the battery will fit in the car