A rechargeable alkaline battery will not lose voltage when stored. This means that even if you do not use it for some time, it will not go dead like a NiMH or NiCD battery does. It does not contain a memory that computes how much energy is left and so you can charge it fully or bit by bit; it will have no negative effect.
These kind of batteries are charged using a specific charger. An alkaline battery charger is available in different styles and brands. They are safe to use and have a built in shut off circuit which helps prevent the unit from short-circuiting in the event of a power surge. Do not attempt to charge your batteries using the regular chargers; it could cause a dangerous explosion. However, some brands of the alkaline chargers can actually charge all three battery types – alkaline, NiCD and NiMH. An alkaline battery charger has the capacity to charge many batteries before becoming redundant. This means they will serve you for longer.
When choosing an alkaline battery charger, go for one that is compatible with the particular type of batteries you use most. Some work better with specific types than with others. As a precaution, check that your batteries do not have any leaks before charging. Leaks often signal the need for replacement.
Alkaline batteries are not hazardous to the environment and can be safely disposed of. NiCD batteries have the worst effect on the environment. NiMH batteries, though somewhat safer than NiCD, give off nickel which dissolves in ground water.
These kind of batteries have green qualities, which make them very energy efficient. They consume low energy and retain power more. Consistent use of these batteries will save you a considerable amount of money.