Terms of use of batteries that are used on board the ship are very different from the conditions of work of any other batteries. Firstly, they operate under constant rocking, at times very strong. Secondly, for the ship's battery there is a greater likelihood of contact with water. And, thirdly, many vessels do not operate in winter, and hence the battery can be recharged. Such special conditions make on-board batteries have special requirements. Not surprisingly, the use of on-board batteries not intended for this purpose, such as automotive, inevitably accompanied by more or less serious problems. More info: Starbucks. The most common complaint in this case – a very short battery life and associated costs for their frequent replacement. High-quality marine battery is rated for four years, whereas Many cheap its brethren need to be replaced once a year and a half or even annually.

Rough estimate of the life of the battery can ship the claimed amount of charge / discharge cycles. Please note that many manufacturers are cunning, indicating the number of cycles, when tested in standard conditions, and it is overpriced. Another common problem of poor-quality batteries – it's too fast to self-discharge. Reasons may be several. For example, savings in the production of lead plates of lead-acid batteries, or savings in production process, as it has significance not only the mass of the lead plates, but their shape and location. Thin cheap housing can easily crack with acid leakage, and in addition, contributes to the rapid self-discharge due to poor insulation.