Yes, you can use a 12V 26Ah battery to replace a 12V 18Ah battery, as the voltage is the same. The 26Ah battery has a higher capacity, which means it can provide power for a longer duration before needing to be recharged. However, ensure that the physical size and connectors are compatible with your application. Always monitor for any potential issues, such as overcharging or overheating.
YES
yes a 5ah battery is a longer working battery than a 4ah so it is actually better than the 4ah
Yes; the 33 amp hours battery will crank longer.
Yes; the 33 amp hours battery will crank longer.
12v means it is suitable for any 12v dc current purpose the 18ah means it has an amp hour rating of 18 its a measure of how long the battery can work from full charge until it would need to be charged again ex. the bigger the ah rating the longer you could turn the starter for before the battery would run flat
Yes you can. The charger has what is called a trickle charge and will need to be left charging at least overnight and maybe for two nights dependant on how little charge the battery has left.
Yes, the amp hour rating gives you an idea of the capacity of the battery and charger. The charger and battery need to have the same voltages. i.e. dont try to charge a 6v battery with a 12 v charger. The battery will be charged until it is full.
You can replace a battery with a battery of the same voltage but greater capacity as long as it will physically fit.
Yes
Yes, you can do this.
No, it does not have enough capacity (i.e. ah rating).
Yes, both batteries perform the same, but the 7ah battery holds more charge.