Battery life depends on how you train. For example:
If you train at around 200 lbs throughout a session, the battery typically supports around 2 sessions on a single charge.
If you train at around 100 lbs throughout a full session, you can expect roughly 6 full sessions on a single charge.
If you train at around 60 lbs for similar session lengths, VOLTRA I can support up to 14 sessions on one charge.
To help preserve battery life, it’s recommended to avoid high training loads when the battery level is low.