Ebike batteries have a handful of important ratings that you should check before purchasing any battery. The main two (V and Ah) are commonly listed, but there are some other important measurements that may be more difficult to find:
- Voltage (V): It's useful to think of voltage as pressure in a system. Higher voltage = higher pressure. The voltage of the pack must match your controller and display. Motors are generally pretty flexible in what they can accept. Voltage limits are strict; that is to say, you cannot exceed them. The important caveat there is, of course, motors. A motor's voltage rating isn't actually a max voltage rating, it's a suggestion based on the motor's max amperage and power rating. Why this is the case will become clear later.
- Amps (A): Think of amperage (amps) as the volume of flow in a system. More amps = greater flow. All of the electrical components on your ebike will have amperage ratings expressed as max and continuous. The max number is a "never exceed" number, while