De condensatoren gaven nog wel eens problemen en zijn rond de eeuwwisseling vervangen door Lithium Ion batterijen. Net als in je telefoon moet je die niet steeds leegtrekken voor een optimale levensduur.
"The original capacitors in the early Kinetic watches had a rather small storage and it needed about only 800 swings of the watch to charge it to its maximum reserve of 3 days."
"The Maxell LiOn cell with its maximum 6-month reserve on the other hand, requires at least 24,000 swings of the watch to get it to its full charge! Which means to achieve this, you have to wear the watch as frequently as possible."
"My watchmaker attempted to thumb-crank the Velatura to get it to a decent charge. Ten minutes later he gave up, citing that both his thumbs were sore! We looked at the power reserve gauge and it registered no more than a mere day’s worth of charge in spite of his efforts."