If you are the lucky owner of a Harley Davidson then you certainly have one of the finest makes of motorcycle on the planet. The importance of obtaining good quality spare parts then is enormous. With a bike like a Harley, cutting costs with spare parts is nothing short of sacrilege and this includes replacement Harley Davidson motorbike batteries.
In short, stay well away from cheap batteries. They are simply not worth it. A new Harley Davidson motorcycle battery should in fact be the best quality brand you can find. Cheaper batteries basically use cheap wire in the plates and poor quality separators, which means they tend to short out very quickly. In some cases this could cause some damage to the electrical equipment on the bike.
Gel cell batteries or those using AGM are a far better alternative. Both of these types tend to last much longer and often provide a far greater level of performance. Put simply, the better quality the internal components, the better the battery is. Lithium batteries are another good alternative due to the fact they tend to be much lighter in weight.
Should you go for a lead acid battery however, you will find that while most are sealed others are not. In such cases you will need to fill them yourself. The important point to look out for when buying a lead acid battery is the length of warranty the manufacturer is offering with the purchase. Obviously the longer the warranty the better quality the battery is likely to be.
Once you have purchased your new battery, maintaining it correctly will be vital. Different batteries can differ greatly as far as maintenance is concerned and consulting the manufacturer's instructions and following them closely will be essential. For example, conventional batteries should be filled with distilled water. Filling them with simple tap water will not do. Indeed, this will damage the battery in next to no time -- not to mention causing damage to the bike itself.
On a final note, when choosing your new battery you should take your environment into consideration. Should you be riding in predominantly hot climates, for example, you will require a battery that has a longer life expectancy. Consult with your dealer if you are unsure about this area.