An electronic device used for charging batteries. There are two types of chargers. A quick charger and a peak charger. A quick charger will charge your batteries for a certain length of time, then stop even if the pack is not done. A peak charger will charge your batteries until they are done. Quick chargers are less expensive, but also have longer charge times and can leave you with a 70% charged battery. A peak charger is slightly more expensive and can completely charge your batteries within a few minutes.