Spare Battery

In detail

A single charge lasts up to 4 hours — enough for most sessions. But if you're on court all day, training in a group or simply never want to stop, the spare battery is your best friend. It swaps in seconds: empty out, full in, keep playing. No cable, no power outlet, no break mid-drill.

What it gives you

• Up to 4 hours of run time per battery — virtually non-stop with two.
• Tool-free swap in seconds.
• Identical for Basic and Pro — one battery, both machines.
• Ideal for group training, tournament prep and long summer days.