Bosch Cordless Powered Secateurs EasyPrune 3.6V

Power-assisted technology handles the hard work effortlessly.
Power Assist Technology effortlessly cuts branches up to 25 mm thick, reducing stress on the hand, unlike manual secateurs. Power assistance kicks into action, as soon as resistance is sensed. A long-lasting 3.6 V battery provides up to 450 cuts on a single charge for flexible, cordless mobility to cut anywhere in the garden. A bypass cutting system, with two premium quality stainless steel blades gliding past one another, encourages healthy plant growth. Enjoy smooth cutting without needing to stop or reposition the secateurs in the process.

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Do these power assist for all things it cuts or does it depend on size/thickness of stem/branch?