When you're starting out there are basically two main options to choose between. You will either get a fairly basic
non-adjustable charger or a smart (also known as a 4-button charger).
Basic chargers
These are a great option as they are cheap and don't require any adjusting/programming to charge. The downside is
they are limited to a specific battery type and are generally pretty slow to charge (2+ hours).
If you have a NiMH battery with a basic charger to suit, and then upgrade to a LiPo, you'll need a new charger that
is compatible with LiPo batteries to charge it safely.
Smart chargers
The smart chargers are very versatile and basically every hobby enthusiast has one of these as they can virtually
charge any battery this hobby throws at us and charge it as quickly as possible (about an hour). However, of course,
they require the user to select the battery they are wanting to charge (it's pretty easy once you know how).