Battery uses are UPS, emergency lights, and camcorders. Amp-hour battery rating is commonly used on sealed lead acid batteries used in UPS systems, emergency lights and camcorders. This battery rating measures a burst of energy that a car needs to start on a cold morning. This rating is used mainly for rating batteries for engine starting capacity and does not apply to NiCad batteries, NiMH batteries or Alkaline batteries. This battery rating measures more of a continuous load on the battery.
Cycle life is the total mumber of cycles a battery yields.
The cycle life is very important in battery applications such as laptop batteries and emergency light batteries. The thick battery plates allow for reserve energy to be stored deep within the battery plate and released during slow discharge such as trolling or electronic instrument use. They are typically used where the battery is discharged to great extent and then recharged. For example, a battery powered trolling motor on a fishing boat. The positive terminal of the first battery is connected to the negative terminal of the second battery, the positive terminal of the second is connected to the negative of the third, etc.