To select the best charger for your NiMH rechargeable battery, first select the feature set that best suits your needs. Select a NiMH battery charger that supports the size and type of battery you will use. You also need to choose between a cheaper timer type and a more expensive charger, equipped with a microprocessor to monitor the charging status. Beware of labels that may mislead the market. Charging times can only be compared when using batteries of the same capacity.
Rechargeable NiMH batteries can be used for a longer time when refrigerated. The first step in selecting a NiMH battery charger is to determine the necessary functions. Some important things to consider include the size of the battery you need to charge, such as AA or AAA, how many you want to charge at a time, and the time you are willing to wait for the charging to complete. If you already have a range of rechargeable batteries, check whether they use nickel hydrogen or nickel cadmium (NiCd) chemicals, as many types of battery chargers support only one. If you are a frequent traveler. The price of Ni MH battery charger will vary greatly due to its characteristics and quality. Many of the cheapest devices use timers, which can provide a stable current into the battery for a period of time, and then return to trickle charging mode. If used properly, these types of charging devices are sufficient, but if used improperly, they will damage or shorten the life of the battery. Before charging, you need to ensure that all batteries are completely exhausted, because the timer based unit will overcharge batteries that are still partially charged. Please make sure not to put the battery in the charger for a long time; Long time trickle charging can shorten the service life of the battery. More expensive NiMH battery chargers are equipped with microprocessors that can monitor the battery charge level, temperature, or a combination of both. These devices are usually labeled as intelligent chargers. When the battery is fully charged or exceeds a certain temperature, they stop charging the battery. The most advanced microprocessor unit can test and repair batteries that may have been damaged by other chargers. No matter what type of industry terms such as fast charging and fast charging, you should be careful about the meaning of fast charging. Therefore, a "fast" NiMH battery charger may actually take longer to charge than the fast charger provided by different manufacturers. Also remember that high-capacity batteries take longer to charge than low-capacity batteries. Only in batteries of the same capacity can the charging time of two or more units be compared and used.
