AA Smart Charger
Overcharging, overheating, weakening, damaging of cell’s elements and sometimes even destruction of rechargeable batteries while recharging is not rare because of several reasons: batteries are left too long in the charger, use of charger which is not appropriate for particular types of rechargeable batteries, inappropriate charging (some chargers require batteries to be charged in pairs) as well as low quality charger and low quality batteries. The vast majority of people is often guided by price when purchasing rechargeable batteries and chargers like in purchase of any other commodity and that is completely understandable. However, the cheapest variants often turn out to be more expensive than the most expensive batteries and chargers.
If you want your rechargeable batteries to last and retain their capacity you need to buy smart when choosing between different types of rechargeable battery chargers. You should perhaps consider a smart charger (sometimes referred as intelligent charger) which does not only feature a LED that indicates the batteries are fully charged but also monitors voltage, temperature and/or time under charge and determines optimal charge current preventing overcharging and overheating. A typical smart charger also features a combination of cut off system which means it stops charging automatically when batteries are fully charged. If you like to forget you are charging batteries a smart charger is definitely worth to consider.
You can choose between a wide range of AA smart chargers which are usually also charge AAA batteries. Since all smart charger manufacturers claim to be the best reading some reviews of customers can make your choice a lot easier especially if considering to purchase a charger which is on the market already for a longer period.