What are the Pros and Cons of Nickel Metal Hydride batteries?
NIMH batteries are the newest battery technology to be used for rechargeable lights. NIMH batteries are up to 40% lighter than even Ni-Cads. This means longer runtimes, less weight, or both. The major disadvantage of NIMH batteries is that they are much more difficult to charge correctly. Unlike Ni-Cads, which can easily tolerate continuous charging without harm, NIMH batteries are easily damaged by even small amounts of overcharge. This means that NIMH powered systems should include high quality “Intelligent” chargers. Beware of any NIMH system that relies on the you, the user, to unplug the charger. Such systems run the dual risk of overcharging and undercharging. Either can lead to the early failure of the battery, usually the most expensive part of any bicycle light.
