How many extra batteries are needed for 2 tasers?

To determine how many extra batteries are needed for two tasers, we first need to understand the standard battery requirement for each taser. Typically, each taser operates with one rechargeable battery, which would provide sufficient power for its operation.

When considering extra batteries for operational readiness, it's common practice to consider having one backup battery for each taser. This ensures that if one taser battery runs low or fails, there is an immediate replacement available to ensure continuous performance without downtime.

Given this context, for two tasers, having one extra battery for each would lead to a total of two extra batteries. However, if the question is interpreted to specify the additional batteries needed beyond what is already included with the tasers (assuming each already has one battery included), then only one extra battery would be necessary overall to maintain optimal operational readiness, making the provision of an extra battery for one taser a practical approach for immediate needs.

The answer of one extra battery aligns with the understanding that each taser is assumed to have one primary battery installed, leading to a minimal yet sufficient extra supply for redundancy.