The Thera Pillow can be used in 15-minute cycles. Two cycles make a 30-minute session, if comfortable. If you are new to it, start with a shorter period and increase gradually.
Thera Pillow 2.0: The automatic cycle shuts off after 15 minutes. Its product page lists up to 22 automatic 15-minute cycles per full charge, or up to 16 cycles at maximum settings. Charging takes about 4.5 hours with a compatible 2A adapter. Actual battery life depends on the settings used.
Thera Pillow 1.0: Use the instructions for the original model. Its charging and battery figures differ from 2.0; do not use the 2.0 figures for a 1.0 pillow.
For controls and indicators, see how to use Thera Pillow 2.0.