Description
With the optional battery pack you can extend your training sessions with the Pro Trainer beyond 2 hours. If you plug in the external battery pack and run it in conjunction with the internal battery you can get 3 1/2 – 4 hours of training time with your Pro Trainer. Goes where you go. Charges quickly with fast charger option. Charges up in 5-6 hours instead of 10-12 hours for the normal charger.
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