Key points in this article
What a prompt should do
A charging prompt exists to guide action, not decorate a screen. From Dongshang New Energy's Yantai observations, a good prompt is short, timed and tied to the step the user is about to take, because a message that arrives too early is ignored and one that arrives too late is useless.
How to judge the effect
Effect is measured by behavior, not by display. If users still skip a safety step after the prompt, the wording or placement is wrong. Collect feedback and watch repeat faults to see if the prompt truly lands, since the only honest test of a message is whether the action it targets actually changes.
Keep improving
Treat prompts as living hints. Dongshang New Energy reviews which messages reduce mistakes and retires the ones users ignore, so the board stays useful instead of becoming background noise nobody reads, because a prompt that is always on is a prompt that eventually means nothing to anyone.